Need help fixing this email rejection notification I keep getting.
I keep trying to send an email to a guy and all of a sudden I'm getting this rejection email back. I don't know what to do with it. Any help?
Your message did not reach some or all of the intended recipients.
Sent: 7/10/2007 11:39 AM
The following recipient(s) could not be reached:
Tim Tompson on 7/10/2007 11:39 AM
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<mail.nationalsalesco.com #5.5.0 smtp;521-EHLO/HELO from sender 126.96.36.199 does not map to mail.nationalsalesco.com in DNS>