How to stop sending email for : DNS Server Timeout Error Number: 1460??

I got this error code in bounce email. How do I stop sending the email to that particular user? Because I know the user's email address is not valid, his email is like:

jshddsj@jhbbsdkjcsdbdsc.com

My mail server is: MailEnable

I am using php, using imap to read the emails..

Any help would be appreciated, thanks

From serverfault $pageUsers[$entry.posts[0].author].name

• Have you read the article in the MailEnable KB about DNS settings?

  http://www.mailenable.com/kb/Content/Article.asp?ID=me020043

  From Kevin Kuphal