In order to enable/disable DNS Blacklisting for a particular domain from MailEnable one needs to perform below mentioned steps:
1) Login into MailEnable Professional.
2) Click on MailEnable -> MailEnable Management -> Messaging Center -> Post Offices.
3) Right Click on domain name -> Properties for which one needs to perform the task.
4) Go to the Tab Feature Selection.
5) Check/uncheck the check box against Enable DNS Blacklisting to Enable or Disable it.
6) Click on apply and Ok.