Mail testing through ESMTP

[syndrometech]

hi,

I have cisco ironport C370. we configured and try to send mail through ESMTP. I got the following error

Your message did not reach some or all of the intended recipients.

      Subject:  test mail @ 3:31 PM

      Sent:     1/20/2011 3:32 PM

The following recipient(s) cannot be reached:

      ( to address) on 1/20/2011 3:32 PM

            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.

            (from address) #5.5.0 smtp;550 #5.1.0 Address rejected.>

Pls give solution to solve the issue.

[Andreas Mueller]

Looks like the other mailserver did not like the recipient address or domain. Did you sent the message to an existing account? And is the error message from your internal mailserver that tries to reach the IronPort, or did the IronPort receive the error from the mailserver it wanted to deliver?

Andreas