If any of the email account sending you the spam emails or you don't want an email account to send the emails, you can blacklist the same account to prevent the incoming emails from it. Following are the steps to Blacklist an email account in MailEnable.
- Open MailEnable MMC.
- Expand Servers >> localhost.
- Right Click on SMTP and select the Properties.
- In SMTP Properties Dialogue box, select the Blocked Address.
- Click on Add button to enter the email account you want to block and Click Ok.
Here it is. MailEnable will prevent the emails from the same email account. You will not receive any of the emails now from it.