What is a Bulk Email Verification Service?
Bulk email list verification – an indispensable tool for companies sending mass emails – determines whether or not a list of email addresses is fully valid and deliverable. The process involves an address-by-address analysis of each email on an uploaded list and is offered as hosted software.
How Does Email Address Verification Work?
The legitimacy of an email address can be measured through a combination of validation techniques and – depending on the internal database – proprietary algorithms.
At the end of the list validation process, any invalid addresses will have been filtered out, leaving a clean, fully deliverable email list, ready for marketing and business requirements.
Below, we’ve described in detail just how the email validation process – essentially, a process of separating the wheat from the chaff – works.
- Email Address Syntax Check: This removes improperly formatted email addresses, according to IETF standards.
- Domain/MX Records Check: This verifies the DNS entries of an email address. If a domain is found to be invalid, or an MX entry is missing, this process marks the corresponding email address as invalid.
- Role-Based Account Detection: Email sends to role-based such as [email protected], [email protected], [email protected], [email protected], etc. can negatively impact your deliverability, and even blacklist you with some ISPs. This process detects and flags such addresses.
- Disposable Email Address (DEA) Detection: Throwaway/disposable email addresses, or “junk collector” email addresses,” are detected and processed
appropriately. These are usually used for signup forms or to bypass login forms which require a valid email address. - Honeypot/ Spam Trap Detection: This detects spam seeds, BOTs, honeypots, blacklisted, or bogus email addresses by checking the addresses in the list
against the known list of email addresses/domains, used for trapping spammers. - Checking DNSBLs and URI DNSBLs for blacklisting: A DNS-based blackhole list (DNSBL) or Real-time Blackhole List (RBL) is a list of IP addresses often used for spamming. A URI DNSBL is a DNSBL that lists domain names which have been found in the body of spam email messages but generally, have not been found inside legitimate messages. In the process, email addresses and IP addresses are checked against known DNSBLs and URI DNSBLs to trap spam networks.
- Final Verification: This phase performs deep-level extended SMTP verifications on each email address. The addresses will be pinged for mailbox existence without sending an actual email to the inbox.
Who Are The Top 10 Bulk Email Verifier Services?
The below is a list of the best email list cleaning and email validation services identified by AccuWebHosting.com thru ongoing exhaustive analysis. Please note, variable listing fees may affect the position on the list. This compensation, however, unequivocally does not influence our review process.
1. ZeroBounce.net – Most Accurate Email Verification App
ZeroBounce is an award-winning email validation service provider.
ZeroBounce is a leading online email validation system to ensure that companies sending complex and high volume email avoid deliverability issues. This is accomplished through the invalid email address and bounced email elimination, IP address validation, and verification of key recipient demographics. ZeroBounce is the best overall email verification service provider. Check out the ZeroBounce Guide to improve Deliverability and Inbox Rate. For developers, you can get all the guides and documents of ZeroBounce here.
What makes ZeroBounce to standout from others?
ZeroBounce is GDPR compliant, has an accuracy guarantee of 98.8%, is part of the US-EU-Swiss Privacy Shield and is one of the best-priced email validation providers. ZeroBounce takes Email Verification one step ahead from others with their newly launched ZeroBounce A.I. system (artificial intelligence email address scoring system).
Verify an Email Address with ZeroBounce
- Cost: ZeroBounce basic plan starts at $16 for 2000 email credits (1 email credit = 1 email verification). They also provide bulk verification plans starting at $390 for 100,000 email credits and for higher plans, email verification cost drops as low as $0.001175 per email verification and credit never expires. ZeroBounce offers special 10% discount to visitors of this blog on first time purchases for new customers. To get this offer, just initiate a chat or send them an email at [email protected]
- Accuracy: 98.8% verification accuracy
- Turnaround time: Process 100,000 email addresses in under one hour.
- Free trial: Yes; ZeroBounce offers a free trial with 100 email credits. No credit card is required to signup for free service.
- Real-time verification through API: Yes; API available for real time and bulk email verification.
- Formats accepted for list and email uploads: .csv and .txt formats
- Format available for downloaded results: Encrypted zip file that contains .csv and pdf report. Very detailed reporting, you should try it.
- Customized / scalable services: ZeroBounce website states they offer custom jobs; contact their support team for more information.
- Email duplication removal : Yes
- Catch-all account detection: Yes
- Greylist checking: Yes; Automatic re-verification of grey listed email addresses.
- Spam trap removal: Yes
- Software download / installation required: No
- Customer support: 24/7 support via ticket and limited chat and phone support.
- Privacy Policy / Data Protection Policy: ZeroBounce is a GDPR compliant, EU-U.S. and Swiss-U.S. Privacy Shield Certified email verification provider. More information can be found in the privacy policy outlined on their website.
- In addition to above checks, ZeroBounce also detects Habitual complainers, Bad domains, Spam keywords, Role Based accounts, Disposable email addresses (DEA), DNSBLs and URI DNSBLs.
- Additional Features –
- Abuse/Spam Trap detection: Removes known email complainers and spam traps from your list.
- Email Data Append: Appends missing data such as first and last name, location, gender or city, state/region, country when the registration IP is provided.
- IP Information Append: Supplied registration will be appended and details like country, region, city, zip will be added.
- User Questions & Answers (Answers by ZeroBounce.net) ::
- Does you service output a possibly corrected email address for emails that were invalid?
Yes, we are able to detect common typos in popular email domains and suggest the correct email address. We call it “Did you mean”. This is very helpful when people have a form on their website and use our real time validator.
- How detailed are the reports that we receive back? I’ve used TowerData and the reports were very detailed but their verifications didn’t seem to be very accurate.
The reports are very detailed. We provide a zip file with all of your emails broken out. We also provide a PDF overview which will list to your top 10 domains, validation results and our data append results.
- Does you service output a possibly corrected email address for emails that were invalid?
2. QuickEmailVerification.com – Most Trusted Email Verifier
QuickEmailVerification is the most trusted and enterprise grade email verification service.
QuickEmailVerification offers online email list cleaning in bulk using real-time verification as well as batch processing. Because of their accuracy, speed (~ 200,000 emails verified in under three hours), and relative affordability, QuickEmailVerification is one of our top pick as a bulk email verifier.
Why more businesses choose QuickEmailVerification over others?
- Encrypted data storage for complete security of your data
- One of the best priced services: starts at $4 for 500
- Highest free credits for trial: Daily 100 credits absolutely free
- Super-fast and fully reliable verification results
- Very high, 99% verification accuracy.
- GDPR compliant
To date, QuickEmailVerification has helped over 70,000 businesses around the globe – from SMBs to Fortune 50 companies – with their deliverability solutions.
Their email verification process incorporates seven different validations, including syntax validation and the checking of mailbox existence. At the end of the verification process, clients receive a detailed report, with all safe-to-send emails cleaned and identified and placed in a new ready-for-mailing list. QuickEmailVerification verifies domestic and international B2C and B2B emails.
QuickEmailVerification completes two different APIs: real-time API and bulk verification API. The real-time API, which is a nearly instantaneous process, checks new submissions on a form, while bulk email verification API processes a full batch of uploaded email addresses and validates each one.
Verify an Email Address with QuickEmailVerification
- Cost: QEV’s fees begin at $4 for 500 credits (1 credit = 1 email verification), and decrease exponentially with increased verification volume. Monthly plans offer increased savings, with the rate dropping to as low as $0.0005 per email. One-time plans are also available.
- Accuracy: 99% email deliverability guarantee (view details)
- Turnaround time: Process 200,000 email addresses in under three hours.
- Free trial: Yes; QEV offers a free trial which will clean 100 emails per day. No credit card is required in order to sign up and utilize their free email verification credits.
- Real-time verification through API: Yes; immediate response – less than a second.
- Formats accepted for list and email uploads: .xls, .xlsx, .ods, .csv and .txt formats
- Format available for downloaded results: .csv
- Customized / scalable services: QEV’s website states they offer custom jobs; contact their support team for more information.
- Catch-all account detection: Yes
- Software download / installation required: No
- Customer support: 24/7 friendly, personalized service support
- Privacy Policy / Data Protection Policy: This information can be found in the privacy policy outlined on QEV’s website.
- In addition to above checks, QuickEmailVerification also detects Habitual complainers, Bad domains, Spam keywords, Role Based accounts, Disposable email addresses (DEA).
- Additional Features –
- Email validation capacity: 200,000 email addresses can be validated in just two to three hours using their self-service application.
- Accuracy ratio for validating Yahoo and Outlook emails: High; among the best in the industry.
- Importing and verifying email list from other ESPs: QuickEmailVerification boasts seamless integration with major ESPs, such as MailChimp, Campaign Monitor, Emma, GetResponse, VerticalResponse, AWeber, ConstantContact, and many others.
- User Questions & Answers (Answers by QEV) ::
- Does QEV provide data validation services that can be integrated with our homegrown database and Marketo database through API?
Yes, by integrating our email verification API with your own application or with Marketo, you can validate your email addresses in real-time. For pricing, please visit our website.
- Does QEV provide data validation services that can be integrated with our homegrown database and Marketo database through API?
3. EmailListVerify.com – Full-Featured Email Verification. But Half The Price.
EmailListVerify makes the verification of your bulk emails super simple.
With 8 advanced verification processes, EmailListVerify ensures that your lists of email addresses are validated quickly, with the best possible sender reputation score. Among others, you will get rid of spam traps, hard bounces, disposable and catch-all emails for a very reasonable price compared to other services.
EmailListVerify boasts a 99% accuracy, guaranteeing zero false positives and a 10x reduction in bounce rates. Their email verification algorithm includes:
- Domain and SMTP validation
- Syntax verification
- Spam-trap detection
- Catch-all domains checking
- MTA validation
- MX records validation
- Email duplicates removal
- Disposable emails cleaning
- Hard bounce checking
- Real-time email checking via API
EmailListVerify gives its clients a clean and simple web interface to process batches. They also provide an API which can be integrated with a web application or a web form and you can also integrate your favorite email service. After the batch validation, EmailListVerify sends a detail report with a link to download your clean email list.
You can try the service for free by using 1,000 free verifications divided to 10 days. EmailListVerify is DPA and GDPR compliant with the security and privacy as their #1 priority.
Verify an Email Address with EmailListVerify
- Cost: Basic plans begin at $4 for 1,000 validation credits – choose either to “pay as you go” or a monthly subscription.
- Accuracy: 97% deliverability guarantee.
- Turnaround time: Depends upon list size and quality; between 30 and 120 minutes.
- Free trial: Yes; EmailListVerify will process 100 emails per day for up to ten days at no cost. No credit card is required during those ten days.
- Real-time verification through API: Yes, for Python, Ruby, PHP, and C#. Sample PHP code available on GitHub.
- Formats accepted for list and email uploads: Upload email list in .xls, .csv or .txt formats.
- Format available for downloaded results: .csv, The end user will get two files, the first file will contain the cleaned list and the second file will contain all the email address with an additional column with the status of each email address.
- Customized / scalable services: Yes; contact EmailListVerify’s sales team or call +44 203-514-8803.
- Email duplication removal: Yes
- Catch-all account detection: Yes
- High risk email detection: Information not availalbe.
- Software download / installation required: No
- Customer support: Limited online support via email and live chat, phone support is available in English.
- Privacy Policy / Data Protection Policy: Find out more on their website’s listed privacy policy.
- EmailListVerify also detects Habitual complainers, Bad domains and Spam Keywords.
- Additional Features –
- Email services integration: with Mailchimp, Sendgrid, Campaign Monitor, Mailerlite +12 other tools.
- Secure data: EmailListVerify is equipped with 256 SSL protocol for data security.
- Real-time bouncing: EmailListVerify sends undetectable verification emails to any address on the list which they cannot accurately validate.
- User Questions & Answers (Answers by EmailListVerify) ::
- I see you offer real-time API calls, but that it could take up to 120 minutes to receive an email response. We use transactional emails. If I send real-time emails – one at a time – how long before I get a response?
For one-by-one API verification, it will take 6 to 25 seconds to receive a response.
- When I send in a list for verification, what exactly will I receive back?
You will receive two files once your email list has been verified. The first file will only contain fully validated emails – a clean email list. The second file will have all the emails uploaded, with a new column which will contain the precise status of every email address. To check a status code, click here.
- Can you provide information on EmailListVerify Integration with WordPress Gravity Forms and CiviCRM. Looking for real-time verification within Gravity Forms in this environment.
- I see you offer real-time API calls, but that it could take up to 120 minutes to receive an email response. We use transactional emails. If I send real-time emails – one at a time – how long before I get a response?
4. Xverify.com – Intelligent Email Verification
Xverify is well-known for their intelligent Email Verification Service.
Xverify is a clear industry leader in bulk email list verification service. They validate all email addresses and can validate both B2C and B2B emails. Accuracy, Security, Trust, and Customer service is what sets them apart.
What makes working with them easy, is that you can call and speak directly with an email consultant. The company has built a strong reputation in email verification industry for over 7 years, having 2 office locations in the United States.
Being that they are US Based Company, you can trust them to safely and securely process your data. Be very cautious considering any providers who don’t give you the option to call and speak with someone or boast similar levels transparency. The security and privacy of your data is their #1 Priority. Click and Call to speak with a live consultant today.
Xverify is CERTIFIED in the EU-U.S. PRIVACY SHIELD FRAMEWORK and the SWISS-U.S. PRIVACY SHIELD FRAMEWORK. They make available DPA’s (Data Processing Addendums) to all clients who require them as part of their GDPR Compliance.
View Xverify’s Email Verification Buyers Guide
Check out this insightful wiki when choosing your provider.
Auto Correction Feature
The typos alone can create 10% of invalid email addresses in a list. Xverify’s built-in auto-correction can easily notify the end users when they spell a domain incorrectly.
Fraud Protection
Xverify’s built-in fraud protection ensures that an email address is not a temporary account or involved with any online fraudster and chargebacks.
Email List Cleaning Accuracy
xVerify’s accuracy rate is about 98% across all major email domains including Gmail, AOL, Yahoo, Hotmail, etc.
Email Verification Response Time
Most of the time, validating major players like AOL, Comcast, Outlook, Yahoo, and Gmail take less than 1 second. While validating a B2B email address, response time may be slightly higher.
- Cost: Xverify offers the low rate of less than $0.01 per each email validation. Pay-as-you-go plans offer clients discounted fees for large-volume lists.
- Accuracy: Xverify boasts a guarantee of 98% email deliverability after cleaning.
- Turnaround time: 100,000 email addresses of B2C data may take one hour to finish. 100,000 B2B emails may take two hours. 10,000 emails may take approximately ten minutes to clean your email list.
- Free trial: Yes; contact the Xverify sales team for a free list assessment and try before you buy.
- Real-time verification through API: Yes; API and JavaScript implementation methods are available.
- Formats accepted for list and email uploads: Upload your email lists in a .csv file format.
- Format available for downloaded results: .csv format, The user will receive the same file with an additional ‘Status’ column, displaying the status of each email address.
- Customized / scalable services: Yes; contact Xverify support for a project quote.
- Email duplication removal: Unknown.
- Catch-all account detection: No
- High risk email detection: Yes; removes hazardous emails that damage your credibility.
- Software download / installation required: No
- Customer support: 24/7 support available for all clients.
- Privacy Policy / Data Protection Policy: Find out more on their website’s listed privacy policy.
- Xverify also checks for Habitual complainers, Bad domains, Spam keywords, Role Based accounts, Disposable email addresses (DEA).
- Additional Features –
- Affiliate Monitoring – XVerify’s affiliate Monitoring helps users identify which affiliate or sub-affiliates send you too much garbage data.
- Accuracy ratio: For validating Yahoo & Outlook emails; one of the best solutions tested for high volume accuracy with Yahoo and Outlook email verification.
- “Send Shield” technology: This is a unique 7-step email verification procedure to minimizes your risk of fraud
- IP blacklist monitoring: Monitor your own IPs to detect blacklisting
- User Questions & Answers (Answers by Xverify) ::
- I see you can do real-time API calls. Will that process filter out people who have left jobs and their company email addresses are no longer valid?
Yes – we do a real-time check to make sure the email is valid at the time of the verification.
- What exactly do I receive back after verifying a list? The original list, with all data fields and a rating of each line item so I can remove them? Or good and bad email addresses in a list? Or a new list, with all bad email addresses removed?
You will get the list back exactly the way you post it to your account. Xverify does not make any changes in columns or rows, but we add an additional “status” column in your file next to the email address field so that results can be sorted accordingly.
- I see you can do real-time API calls. Will that process filter out people who have left jobs and their company email addresses are no longer valid?
5. MyEmailVerifier – Best Email Validation Services
MyEmailVerifier offers very fast and simple email verification service.
MyEmailVerifier is a privately owned Email List Verification service provider with 96% deliverability. MyEmailVerifier is an emerging vendor with effective and a helpful email verification tool. MyEmailVerifier’s mission is to boost your leads and help you focus on generating new business.
MyEmailVerifier’s email list verification service provides real-time verification API for businesses who rely heavily on email marketing. MyEmailVerifier boosts conversions by improving email deliverability. Their user-friendly interface is making the difference when it comes to cleaning an email list. In a nutshell, MyEmailVerifier is an email validation tool that suits companies of every size when it comes for sustainability and affordable pricing.
Verify an Email Address with MyEmailVerifier
- Cost: Pay-as-you go. No monthly payments or upfront fees. MyEmailVerifier is running super saver discount of flat 40% on all purchases. Basic plans begin at ($2.4) $1.44 for 500 email verification credits. Additional tier options: ($4.8) $2.88 for 1000 verifications, ($21) $12.60 for 5000, ($36) $21.60 for 10,000, and ($120) $72 for 50000 Email verifications.
- Accuracy: 96% deliverability guarantee.
- Turnaround time: Process 1000 email addresses under 45 minutes.
- Free trial: Yes; the first 100 verifications are free; signup is required.
- Real-time verification through API: Yes; API available with JSON.
- Formats accepted for list and email uploads: TXT and CSV
- Format available for downloaded results: TXT
- Customized / scalable services: Yes
- Email duplication removal: Yes
- Catch-all account detection: Yes, it displays it with unknown status.
- High risk email detection: Yes, it displays it with unknown status.
- Software download / installation required: No
- Customer support: Limited online support via email.
- Privacy Policy / Data Protection Policy: Privacy Policy is documented on the website and data handling is completely safe within the content.
6. DataValidation – Email Verification you can trust
DataValidation is one of the leading email verification service providers around the globe.
DataValidation (Headquartered at Atlanta) is a leading email deliverability solution provider for corporate email service providers and email marketers. Email marketers can verify their email list quickly and securely, by using one of the supported ESP Integrations or Batch Verification APIs. Datavalidation works directly with ESPs, so you don’t have to worry about your data security.
DataValidation is offering a special promotion to the visitors of this blog. Receive a 10% discount on your first purchase, whether its a one-time verification or one of their larger token packs that can be used over time. If you purchase their services in November 2018, you will receive a one-year subscription of AutoPilot Large allowing you to have up to 500,000 emails monitored weekly (a $240 value). If you see the quality of your email list deteriorating over time, verify it to increase deliverability and ROI, and to protect your sender reputation. To claim this special offer, you can initiate a live chat with them or send them an email at [email protected]
It easily integrates with the most popular email service providers like MailChimp, AWeber, MailGun, SendGrid, etc. to automate the email list validation process. They do offer free verification for 100 email accounts at signup, as well as free list quality report for every list. Furthermore, they are available 24/5 to answers your questions.
DataValidation is GDPR compliant and offers 99% Deliverability Guarantee. Free list monitoring with Autopilot is an added advantage when you are using their service. Apart from this, they provide the most comprehensive API for real-time and bulk email verification.
When you are using DataValidation as your email verification provider, you have an option to choose the region of the verification servers (available upon request). You can select the region of the verification servers to be in the EU or North America.
DataValidation’s Real-Time Email Verification Demo
- Cost: DataValidation’s basic plan for 1000 verification starts at $7. Their bulk email verifiation plan for 100,000 email accounts costs $300.
- Accuracy: 99% Deliverability Guarantee
- Turnaround time: Process 100,000 email addresses in under two hour.
- Free trial: Yes; DataValidation offers a free trial with 100 email credits. No credit card is required to signup for free service.
- Real-time verification through API: Yes, for multiple platforms, Realtime API and Batch API.
- Formats accepted for list and email uploads: .csv and .txt formats
- Format available for downloaded results: .csv and .txt formats
- Customized / scalable services: Yes
- Email duplication removal : Yes
- Catch-all account detection: Yes
- Spam trap removal: Unknown
- Habitual complainers detection :: Yes
- Honeypots/Spam traps detection :: Yes
- Software download / installation required: No
- Customer support: 24/5 via live chat and email
- Privacy Policy / Data Protection Policy: DataValidation is a GDPR compliant. More information can be found in the Data Protection and Privacy Principles outlined on their website.
- Additional Features –
- Capacity in terms of processing email validation
They do not have any limits, you can validate as many lists with as many email addresses as you need. - Custom verification servers
To help you stay in compliance with GDPR requirements, you can chose to verify email addresses only on EU servers. - Trusted monitoring network
DataValidation uses a global network of servers that are trusted by Internet Service Providers all over the world.
- Capacity in terms of processing email validation
7. MillionVerifier – Email Checker at it best
MillionVerifier is a bulk email verification service provider who offers the verification at the lowest cost.
MillionVerifier checks Email Syntax, Domain existance, Blacklisting, deep level SMTP verification, role-based accounts, Catch-All accounts, Disposable Email accounts, and much more. This is the most accurate and reliable service provider. They offer 99% guarantee for the valid emails along with 100% money back guarantee.
- Cost: Cost per email is $0.000398 – $199 USD for 500,000 Email Validations
- Accuracy: 99%
- Turnaround time: Process 100,000 email addresses in under one hour.
- Free Trial: Yes; MillionVerifier offers a free trial with 200 email credits. No credit card is required to signup for free service.
- Real Time Email Verification/API service: Yes
- Formats accepted for list and email uploads: TXT, CSV, XLS or XLSX
- Formats available for downloaded results: CSV
- Customized / scalable services: No, they offer fixed packages.
- Email duplication removal: Yes
- Catch-all account detection: Yes
- Software Download and installation required: No
- Privacy Policy / Data Protection Policy: MillionVerifier does not share any client data with a 3rd party. Read their Privacy-Policy.
- In addition to the above checks, inactive email accounts also detect Habitual complainers, Bad domains, Spam keywords, Role Based accounts, Duplicates, Disposable email addresses (DEA) and remove Spam traps.
8. MailboxValidator – Hassle Free Email Verification Service
MailboxValidator is an easy-to-use email list cleaning service that helps to reduce your bounce rate, while boosting sender reputation.
It validates your email lists to check for invalid or undeliverable emails so that you can maximize your marketing campaign potential. You can either upload your email list and clean it in bulk using the CSV format, or integrate with MailboxValidator API.
MailboxValidator interface is fully integrated with major ESP (Email Service Provider). Alternatively, a list can be imported from an ESP within few minutes which makes the process fully secure. Integration is available for MailChimp, Zapier, AWeber, Mailgun, Campaign Monitor, SendGrid and SparkPost.
Verify an Email Address with MailboxValidator
- Cost: MailboxValidator provide basic bulk plan starts at $19.95 for 1000 email validation for 30 days with 24/7/365 email support. To verify huge bulk list it costs $0.0007 per validation. Meanwhile, the API plan starts at $29.95 for 3,000 queries per month. MailboxValidator offers the low rate of less than $0.0009 per each email validation for large-volume email queries.
- Accuracy: 96% deliverability guaranteed.
- Turnaround time: 200,000 email addresses will be processed within 24 hours time.
- Free trial: Yes; For bulk plan, user can sign up for free trial which will give 100 verification. For API plan, 300 Queries will be given to free trial plan MONTHLY.
- Real-time verification through API: Yes; The validation results in either JSON or XML format. Sample code is available in PHP, Java, VB.NET, C#, Python.
- Formats accepted for list and email uploads: CSV
- Format available for downloaded results: CSV
- Customized / scalable services: No
- Privacy Policy / Data Protection Policy: Find out more on their website’s listed privacy policy.
- Software download / installation required: No
- Email duplication removal: Yes
- Catch-all account detection: Yes
- Greylist checking: Yes
- Suppressed Email Checker: Yes
- High risk keyword email detection: Yes
- Bad domain detection: Yes
- Role-based account detection: Yes
- Disposable email address (DEA) detection: Yes
- Spam trap removal: Yes
9. EmailMarker.com – Email List Cleaning Service
EmailMarker is one of the most useful tools for email list cleaning.
EmailMarker is one of the leading email list cleaning service provider for email verification. Being in the industry for many years, EmailMarker takes pride in delivering email lists cleaning services of incredible quality.
In the recent years, EmailMarker has made a great transformation using an automated self-service software. Due to this, the client’s are allowed to upload their lists online on the emailMarker web application, and the system handles everything very easily and very fast. Filtering low-quality emails this software protects your reputation and boosting your email campaign.
The level of professionalism has made EmailMarker a successful provider and all the clients are always satisfied with the excellent results. They handle every customers’ lists with great responsibility and ensure the clients that, they prioritize safety more than anything. This is the reason that various huge companies trust EmailMarker with their data and continue working with them every time. They do provide a full refund if you receive more than 5% bounce-backs from the cleaned email list.
EmailMarker diverse and very functional team is always ready to take challenges and works with passion and devotion.
Verify an Email Address with EmailMarker
- Cost: Basic plans begin at $3 for 1000 email verifications and $161 for 100,000 email verifications. Use coupon code ACCU25 for an additional 25% discount.
- Accuracy: 97% deliverability guarantee.
- Turnaround time: Process 100,000 email addresses in under four hour.
- Free trial: Yes; 150 verifications free at sign-up.
- Real-time verification through API: Yes; for PHP, Python, Ruby, and C#.
- Formats accepted for list and email uploads: Email list for verification is accepted in .csv, .xls, .xlsx, .txt format.
- Format available for downloaded results: .csv, Once the list is cleaned, the client receives two files. One file contains cleaned email address and the second file contains the original list with a new column for email status code.
- Customized / scalable services: Yes
- Email duplication removal: Yes
- Catch-all account detection: Yes
- High risk email detection: Information not availalbe.
- Software download / installation required: No
- Customer support: Limited online support via live email and live chat; phone support available in English.
- Privacy Policy / Data Protection Policy: Find out more on their website’s listed privacy policy.
- In addition to above checks, EmailMarker also detects Habitual complainers, Bad domains, Spam keywords, Role Based accounts, Disposable email addresses (DEA), DNSBLs and URI DNSBLs.
- Additional Features –
- Email de-duplication: Identifies and merges duplicate records to reduce cost.
- Accurate syntax engine: Detects invalid email formats while allowing legitimate ones to pass through.
- Active mail check: Verify whether mail to a mailbox will bounce or deliver.
- Quality domain database: This accurately confirms the condition of every email domain.
- MailChimp compatible: EmailMarker will import and export email lists from the MailChimp platform.
- SSL Security: 256-bit encryption
- User Questions & Answers (Answers by EmailMarker) ::
- What will I receive back after sending EmailMarker a list for verification?
EmailMarker returns two files, the first file contains only the valid emails address and the second file will contain the original email list, with a new column for email status.
- Does your website keep the emails and information I upload? I want to ensure the information isn’t used by the website for anything and my contacts’ emails are safe.
We don’t sell or use any information about your email contacts, all your data is encrypted and stored under the rules of our privacy policy and is only accessible by someone with login credentials.
- What will I receive back after sending EmailMarker a list for verification?
10. TheChecker – The Most Cost-Effective Solution
TheChecker is the most cost-effective email verification and email list cleaning service in the market.
It makes it easy and affordable for businesses to protect their email sending reputation and avoid inbox delivery issues that lead to a loss of sales opportunities.
What takes TheChecker apart from the competition?
- Accurate results (99%)
- Affordable prices
- Blazing-fast verification
- Easy integration
- Powerful API
- #1 in customer satisfaction in G2 Crowd, Capterra and TrustPilot verified reviews
- 30% lifetime affiliate commission
- GDPR compliant
- Awesome live multilanguage customer support
Get 100 FREE credits to test and see the difference with your own eyes.
- Cost: Basic plans begin at $3 for 1,000 validation credits that NEVER expire.
- Accuracy: 99% deliverability guarantee for most of the major email providers.
- Turnaround time: Usually verifies 100,000 email verifications in less than an hour.
- Free trial: TheChecker offers 100 FREE credits to try, either using our web app, API or TC Forms. No credit card is required to try.
- Real-time verification through API: Yes, for single and bulk verification.
- Formats accepted for a list and email uploads: TXT, CSV, XLS & XLSX files.
- Format available for downloaded results: CSV. The customer downloads a ZIP file with files grouped by status. We do not modify your original file format.
- Customized / scalable services: Yes; TheChecker can offer custom plans to fit your needs, budget and tech infrastructure. Our tech support is made by developers that can help your team to get things up and running fast.
- Email duplication removal: Yes, for free.
- Catch-all account detection: Yes.
- High-risk email detection: TheChecker classifies as “Risky”.
- Software download/installation required: No, it’s a 100% online service.
- Customer support: Live multilanguage customer support (English, Spanish, Portuguese, French, Italian, Russian and Korean) via chat and email, usually 12+ hours per day. Limited support through the phone.
- Privacy Policy / Data Protection Policy: Kindly find out more on their website’s listed privacy policy.
- Additional Features –
- Anti-greylisting technology: get the most accurate results.
- TC Forms: Add real-time email verification tool to any form on your website by just copying and pasting one line of code.
- Integrations: Connect with your favorite email marketing tool.
- 30% lifetime commission affiliate program: Join the most loved email verifier and make money with it.
Why is Email Address Verification so important?
Most websites have forms asking for customer details, including an email address. While filling out such forms, it’s not uncommon for users to enter an incorrect email
address – whether intentionally or by mistake. All those incorrect email addresses added to your lists will be inaccurate – and undeliverable.
If you send emails to such addresses, the ratio of bounce-back emails will increase significantly. This bounce-back negatively impacts your mail server reputation, which is constantly monitored by Yahoo, Gmail, AOL, Hotmail, and other ISPs.
If your IP address develops a poor reputation, it may get blacklisted by popular email services like Gmail and the like.
This means that if you plan to run bulk email marketing campaigns, such as newsletters or sales emails, the identification and removal of invalid email addresses is essential.
Email verification ensures your email list is clean and thoroughly valid, which helps reduce bounce-back, ultimately saving you time and money.
Validating email addresses also helps you to maximize deliverability of your marketing campaign, and separates low-quality addresses from high-value contacts.
By harnessing the power of email list validation services, you can enjoy peace of mind with every send, knowing your emails go out to real, live humans.
Quick Comparison of the Best Email Verification Services
| Bulk Email Verifiers | ZeroBounce | QEV | EmailListVerify | Xverify |
|---|---|---|---|---|
| 100k Email Verifications | $390 | $320 | $169 | $400 |
| Offers Free Trial? |
Yes | Yes | Yes | Yes |
| Total Free Email Verifications | 100 Credits One Time |
100 Credits Daily |
100 Credits One Time |
100 Credits One Time |
| Validation Accuracy Ratio | 98.8% | 99% | 97% | 98% |
| Credit Card Required for Signup? | No | No | No | No |
| Time required for 200k Validation | < 2 hour | < 3 hours | < 3 hours | < 2 hours |
| View Plans » | View Plans » | View Plans » | View Plans » |
Email verification domain is filled with never ending number of service providers, which makes it difficult to enlist all. Some of the notable service providers are Correct.email, DeBounce, EmailListValidation, EmailHippo, NeverBounce, Kickbox, BriteVerify, Hunter, MailFloss, ListWise, and more.
Do you have user experience with any of the above email verification services? If yes, we would like to hear that. Please comment your experience about any of the above company.
Rahul Vaghasia
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We have been using Email Answers for about a year now and I would recommend them for email list verify service. They also have a new platform called Purelist for real-time list scrubbing.
Hello Rahul,
I honestly think that Bulk Email Checker at #8 should be ranked much higher up on the list. With their 95% deliverability guaranteed quality of their email validation services coupled with all of their additional features and affordable pricing, compared to others they really are much better than most of these companies. I have tried 6 or so from this list and after visiting Bulk Email Checker my search stopped as I know I can not find better at this time.
no, they are terrible as cant check yahoo email addresses sadly. Its the toughest one to check as its catchall and they dont mention it anywhere that they have trouble with them
You seem to have missed out one of the best email verification apps that I have used – emailverifierapp. I think your visitors would find it resourceful. But good list there. Well done compiling them into one big list. These services are helpful indeed.
This company (lead-factory) also offers database cleaning API.
How were we left out? We have been in the game longer than most of the companies on this list, we do over 300,000,000 a month. We can give you a free bulk email verification trial to test out our service if you would like.
Thank you Jacob for suggesting XVerify.com. This email filtering service will be reviewed and included shortly.
If you would like I could provide you with an extended free trial.
Hi is it possible to get a free trial without filling in the credit card details…?
I use mycleanlist and they are very good too… And I found them cheapest email verifier by price among of all of above…. give it a try…
Hi Rahul, have you listed this email validating softwares rank wise or just randomly?
The list of email validating services is randomly ordered.
Is there any Indian company which provide email verification service, i am looking for low cost email verification
Great list!! I am looking to become a email list cleaner. Can you recommend a good email list verifier software reseller. We would love to find a good software to buy.
EmailChecker.com offer white label solutions.
Would love for you to try out and evaluate YouVerifyIt’s email verification service. Our founders have been in this space for a decade and have built a phenomenal email address verification engine that is soon to be released! Just fill out the contact form and we can get you started!
We can make an offer to you in order to clean your mails. validmail.fr can validate about 99.999% of email address for you. Our products can treat about 10 millions address by day if necessary, and can treat protected mails like free.fr or online.fr which are using sender-verify technics.
If one is simply looking to ping (i.e. perform an SMTP check) on email addresses, which is what the companies listed above all do, then you’re not going to be solving your deliverability problems.
Deliverability issues are the result of three main factors in the following order of priority:
Pinging is discouraged by many ISPs, which will shut down attempts over a certain number or provide back inaccurate information so any service that simply performs pinging only might result in more issues than you first started with as you will end up throwing out good addresses with the bad. Furthermore, pinging an email address, even if this could be 100% accurate, will not flag spamtraps, honeypots, heavy spam complainers, “role” accounts that go to multiple accounts, and other malicious addresses that can destroy one’s email program.
Accordingly, marketers need to employ a service that blocks deliverable but toxic addresses, corrects hygiene errors, and validates all email addresses that survive the first two screens. Doing this properly requires expertise, experience, technology, and a knowledgebase built over years of reviewing billions of email addresses.
Bill, can you suggest a good service?
Hi Bill, good comments – what service do you recommend?
freshaddress .com
FreshAddress’s clients include 25% of the Fortune 100 and its SafeToSend service is literally 5 to 7 years ahead of any providers in the industry. Founded and led by the founder/leader of the MIT Blackjack Team, 1,000’s of companies, big and small, rely exclusively on FreshAddress to ensure their marketing databases are as fresh and accurate as possible.
I used Bulk email checker for a list of about 1,000 emails that from my business contacts. The user interface was very easy to work with and the dashboard is nice. My only issue is that 54% of my emails came back as “Unknown” with the following messages:
The address does not have a mx server.
Is a Catchall mx server config.
The email address does not have a valid dns.
Is this common when you have a lot of corporate email domains?
Yes man this is kind of common when your list contains non free corporate domains emails.Best way to check those idz if your list is small is to mix them with known valid yahoo/gmail/hotmail email addresses & shoot-out a test email campaign with a free mailchimp account (Upto 2000 contacts) & you’ll get the best possible result!
I use bdwebit dot com their SMTP and Email verifier is too good. I am using their service from last 3 years.
Can you tell me a little bit more about bdwebit Email Verifier? What’s its feature? Can it detect spam trap, honeybot,…? Is it effective? And if possible, would you please show me the screenshot of this email verification software? Thank you!
Hi, I recently purchased a US business database close to 500K executives and soon after my 1st campaign my mailing account was locked. Can you suggest a good email verifier to remove invalid, spam traps, catch all and other possible troublesome emails? I’m confused with the options available and dont want to be spending another bomb on this database.
An excellent article Rahul. Thank you so much for putting together a list of some of the verification vendors. We recently evaluated several vendors for verification and have found most of them to all offer the same thing. Let’s face it, verification is a commodity. Webbula is someone I noticed that wasn’t on your list and we found their service offering to be excellent because not only do the offer the same verification services as everyone else, but they offer hygiene services to identify moles, traps, complainers, and other toxic emails. That won us over.
Nice to see your post which is very help full for all the fraternity in email marketing domain. We are an Indian startup and recently launched our venture in the same domain as verifyemaillist dot com. I request you to please evaluate the same and if possible please cover it in your any existing or upcoming article.
Hello Rahul,
Thank you for the informative article and for providing the large list of vendors. I am currently using emailverifierapp dot com to bulk verify email address in my opt-in forms since January. Their service is top notch as I have experienced a 100% uptime, an average bounce rate of just 0.33% and their speed is so fast my subscribers do not even realize their email is being verified in realtime.
I am curious as to why they have not made this list of vendors since the service they provide seems to be a perfect fit?
we have been using the bulk email checker api and are fairly pleased with it. Price wise it is less expensive that others and as far as quality and speed, I was not able to to detect any difference between bulk email checker KickBox.com as far as accuracy of the data.
The user interface is a little odd – feels incomplete – can’t search the hard bounces, when exporting hard bounces they come back as 1 row (normally I would expect the data to come back 1 row per entry) and a few other things like that.
Support has been responsive and have answered questions within a few hours. I contacted support for several others and they provided the fastest responses.
they dont fully verify yahoo so pretty useless
Thank you for the article. Email Hippo validates Yahoo addresses, it’s the only service that does this.
Experian Data Quality has the best validation services in the game. Shoot me an email and I can set you up with a free data test and show you how it works – jordan.brown at experian.com
I can’t believe you don’t have emailverifierapi dot com added to this list. Out of all the services you have listed, Email Verifier Api is the only enterprise grade service. I don’t want to deal with issues, so enterprise grade quality is the only acceptable services.
Emailverifierapp.com is not reliable email list verifier. I bought a package of cleaning 100000 email but it cleaned only just 25000 email and rest 75000 was not cleaned. Issue was intimated to Support team . Its 5 days since issue happened and they are not able to fix.
So be careful and better to go by small volume packages to ensure that the service and product works fine.
I am now looking for another email list cleaner.
We are looking for a company who can give officially approved document about that the verified e-mail addresses are really valid and checked.
Do you know any company like that?
Hi Neus
We at Locate Ventures pvt ltd can do that. Check out locateventures dot com
Thanks for collecting all services together. It helps to compare services but some of the features listed above for some services are not available. Even they do not provide what they claim for on their website. We’ve been using daily credits plan of http://QuickEmailVerification.com for more than two years now. Excellent service and support. It is Enterprise level service designed for both large and small businesses. We have already compared many other service providers in the above list and have also tried paid service from some of them but we could not get the accuracy we expected. Nearly zero bounce rate was our primary concern since we have been using MailChimp for sending email campaigns. Due to high bounce rate our account had been suspended by MailChimp and we had very hard time to get it fixed.
Hi,
I would like to recommend our new application HuBuCo
– Fast online validator, one by one, bulk uploads and API.
– Very competitive pricing: e.g. $19 for 10,000 emails
– Refund your credits for Unkown like catch all and anti spam systems
It would be great if you tried our system (also offer 500 free credits to try) and left your comments.
Thanks
Hi Tamas, looks like your pricing is much higher now, $80 for 10,000 emails, is that correct?
Thanks
Hi
Great article.
Question: Is there any way to verify an email address if the server has been set to “accept all”.
I am busy testing http://Www.QuickEmailVerification.Com and became aware of some of our clients who have this config. Specifically those who route their mail through websense.
Actually to identify accurately if email is “accept all” or not is also an advance feature! I believe that there is no other option to verify “Accept All” emails with 100% accuracy. Based on amount of “Accept all” emails in your list you can plan your strategy to send email campaign. After comparing some best-in-class providers in the above list (Thanks AccuWebHosting), we’ve been using http://quickemailverification.com for last four months now and have been satisfied with that service. There are many providers but very few of them having best accuracy of the service. And from those accurate service providers, only QuickEmailVerification’s price meets best to us. You may also find the one which meets with your needs from this list!
I found this service proofy dot io as most accurate and obviously the best one on the market.
Proofy dot io doesn’t serves its purpose well and is full of problems:
– we have been billed 3 times to withdraw a single list of checked mails
– One check returned status “undeliverable” for all emails in it, which by no chance is not true, cause the same list was tested in 3 other services as well.
– Their support is **** . We issued like 4-5 notifications/tickets to their support – recieved so far 0 feedback (3 weeks so far)
– Their statistics before withrdawal of a list are buggy as well – e.g. from a list with 3000 mails, the statistic contained 1500 emails with certain status, after downlowding the actual list, what a surprice! all entries had a status; another e.g. very often after a check is done once the statistic shows xx% pricocessing, after log out and log in – yy% processing.
You are free to draw your own conclusions. For us – one of the worst services, we’ve used.
Hello, Petko!
We are very sorry for this situation
In last few month service Proofy changed all support team
We want to see what problem do you have and we ask you please send your user ID and email from proofy account
thanks
I used HuBuCo for verifying my email list and it was very easy. It allowed me to quickly get a very accurate list of ok emails, bad emails and even emails that forward to other addresses (so if a recent contact has left a company, I will know if the email is being forwarded or if it was just deleted from that company’s server). I scanned over 10,000 email addresses and the verification was completed within 15 minutes. Very easy and when I had questions, customer service was quick and easy to work with. They even offered help with a piece of the process they had no control over, which was very nice of them and makes me feel very comfortable recommending them as my #1 choice for verifying email address lists quickly and accurately. Hope that helps!
Jennifer
Thanks for this great list of bulk email validation tools.
In the past, I’ve used some services of your list like Briteverify or DataValidation, but recently, I’ve switched to nojunk.io which is quite new but I think it has the best RoI :
Thanks again, this list helps a lot to discover and try new email validation services and I hope you’ll have great results with nojunk
Mick
Hi, This blog is just phenomenal. I came across another provider: verifalia dot com. They provide 125 validations / day for free. Any experience with this provider?
Hey Rahul
Great post! I wanted to test and compare services and this post gave me a lot of options!
I have been into email marketing for a few years now and I have learnt an important lesson: never use email lists that have not been cleaned. MailChimp once suspended our account and man, did we have a hard time, getting it back in action!
So while comparing services listed here I used criteria like Accuracy, Support, Pricing and Speed, mostly in this order. While no service can score 10/10 on every criteria, I think
http://QuickEmailVerification.com (currently # 3 in this list) makes most sense. I was particulary impressed with its Accuracy and the Support. I first used their 100 free validations and found the output was highly accurate and quick. I shot a querry to their Support (like I did for every service I tried) and QuickEmailVerification’s reponse was most helpful. And of course, their Pricing is extremely competitive so you don’t have anything else to think about.
Of course, you may want to check it out yourself and not take my word for it – go ahead.
This is a great article. Are there any email verifiers that support mobile apps integration and also if we can get update via mobile for our cleaned list and download list etc.
Thanks Clay for reaching out. Try out any of these – QuickEmailVerification, Hubuco & xVerify. They have responsive dashboard. You can access it through your mobile device, upload email list and download cleaned list. Also, Email YoYo has launched their mobile application for email cleansing. You can also consider them.
Hey Rahul, I must say its a great compilation. I had used datavalidation in past and they had been excellent so far but I am willing to cut short my budget. Can you suggest us similar provider with affordable pricing? Thanks.
Thank you, Jonas! We review many providers at regular intervals to update our blog with the best providers.I can suggest you xVerify.com.It looks similar to Datavalidation.
Hello Rahul, Great detailed article. I want to clean my generic free email provider list like Yahoo, Gmail and hotmail. Can you suggest a provider.
Yeah certainly. You can choose either of these QuickEmailVerification, Hubuco or BriteVerify. These email verifiers have good track records in cleaning free email providers.
Very nice information We have email verification tool https:// b2bsprout dot com/email-validation-tool/
Real-Time email verification
1000 reports free
API Support
Thanks for the great share. Most of the listed providers here offer limited free trials. I need an email verifier who can offer unlimited free email validations forever. Can you suggest any?
What was the problem with QuickEmailVerification campaign? We’d recommend any of top 3 email validation providers, i.e., Xverify, HUBUCO, Towerdata and Kickbox. You can choose as per your budget and requirements. It’d be better to take a free trial before signing up. Best of Luck.
The list and details are superb. Do you know any of the email hygiene provider which provides a WordPress plugin kind of solution, so even a non technical person can also use it. I know API are available but just wondering if any ready to use wordpress plugins are available?
This is a really helpful list Rahul, thank you. Could you clarify whether you have listed it in order of those you think perform the best, or is there no rationale for the order? I notice that some email verifiers at the top don’t have some of the features those lower seem to offer. Also, it would be amazing if at some point you could compile a table with checks / crosses next to features offered – would really make comparison easy.
Just an FYI, I’ve been running tests with each provider that offers free tests. Mailbox Validator marked every hotmail email as invalid, which is not the case.
Hi,
Any email verification vendor GDPR/PrivacyShield certified? Thanks in advance!
Hello Tammina, CaptainVerify does not provide completely free email verification. Their charges start from $7 for 1k email verification.
Hi Rahul,
This is indeed a great summary of features about the different available options for email validation tools. I would appreciate if you guys can evaluate email validation from weblegit.com as well. I should point out the cons/ perceived cons that we do not do the bulk email validation. Our USP is one line integration (no API/programming knowledge required), and we validate emails for public free email providers like gmail, yahoo, outlook, aol with 100% accuracy.
Of the services listed here I found #1 and #3 the most effective. Another one I’ve been using is mail mule – I think they’re a little new but the service is really good. The support team is especially supportive which means its probably quite well managed.
So far in terms of quality mail mule, hubuco and emailchecker are good. Of all of these in pricing terms I think mailmule is the best. My own 2c naturally. I send out a fair few emails for my site and it helps to have a reliable verification service.
Thank you, AccuWebHosting, for choosing us as the No. 1 email verification service. We appreciate your kind review and the fact that you’ve shared it with your audience.
Our website https://www.zerobounce.net awaits everyone with the best prices and the best email validation system on the market. The ZeroBounce customer support team is online 24/7 to help you with any information you might need, in the shortest amount of time.
Again, thank you for reviewing us! Your opinion means a lot to us.
Hello, Rahul & friends interested in email marketing,
I wanted to share with you the news about ZeroBounce publishing a very useful resource for everyone sending mass emails. It’s called “The Complete Guide to Improve Inbox and Deliverability” and it was created by our team of experts, who have lots of experience in this field.
The guide is free of charge and its purpose is to help marketers who struggle with deliverability issues. We thought it would be a great extension of our email verification service and we know it is going to save people a lot of time and effort.
Take a look, I’ll leave you the link, if you don’t mind: https://www.zerobounce.net/guide-to-improve-inbox-and-delivery.html
Hope everyone can get real value out of it! We wish you a happy and successful 2018!
This is a really helpful list Rahul, thanks. We have just started to use a new online service from WinPure, its called Email Verifier Pro – emails dot winpure dot com
They provide both bulk email validation and an API which can be used on webforms, forums and signups. From what we have seen so far its one of the most robust and accurate email verification services in the marketplace, and with subscriptions and pay-per-use they offer something to fit all budgets, worth a look!
Hi,
did you consider to evaluate and add email-validator.net to this list?
Our Real-Time Email Validation Process (API and Bulk Upload) provides 100% accurate results and includes
+ Disposable email address detection
+ Misspelled domain detection to prevent Typosquatting
+ Mailbox existence checking
+ Catch-All testing
+ Greylisting detection
Risk-Free: 30-Day Money Back Guarantee
Made in Germany
24/7 World Class Support
Top Customers like Adobe, Citrix, Autodesk, Salesforce, Washington Post and many more.
Thank you!
Hi Rahul ,
Please evaluate emailexistdotcom, we recently launched beta 1.0, Tool to verify whether email exists in real world. It extracts the MX records and other proprietary techniques and strategies from the email address and connect to mail server to make sure the mailbox really exists for the email Id.
It validates :
– Syntax
– Role-based
– Mail server
– Disposal Emails
– catch-all
– Server status
– Spam Rate Calculation
and use proprietary techniques and strategies from the email address
Our custom API provides email verification for single and bulk emails which can use within your application, we had done with PHP library and more on the way to come .
Note: Website is going to updated in few days
Thank you, Raphael! We review many providers at regular intervals to update our blog with the best providers. We will surely review emailexistdotcom and update our findings.
Thanks Jason-Pat,
will be waiting for your response
I think you should look at bouncekick.com, i have done email marketing for the last 13 years, and always looked for a selfhosted email validator – I came across this product and purchased with a one time payment of $1500, even though the system currently missing a few features their team is really working hard to make new releases of the software currently they release new updates every weeks!
I mean validating email databases can be a costly affair, and with a one-time payment i must admit that this software really gives you value for the money – Besides that its the first selfhosted email validation software i have ever found.
Thank you for verifying and adding emailverifier.com, after testing a lot of different tools from the lists above I settings with Emailverifier. The reason, simple. I pay $300 per lead over adwords, so I cant really afford to lose leads due to false positives, their 99% accuracy guarantee was attractive but in all honesty the reasults are very accurate
Another one great solution is truemail.io.
Convenient, easy and fast email verification tool. By the way, it has free trial and you can verify your first 1000 email for free.
I really like Zerobounce.net – i think they are the most accurate
This is a nice list of email verifiers and I can see a good amount of effort that has gone into the blog. I would appreciate if you can add antideo.com to the list as well. Antideo is an API service that helps user to do a live detection of disposable email addresses and the list is auto-updated so that you always stay ahead of the curve. And the icing on the cake is that a user can make upto 5000 API/month for free.