I get an error anytime I (or anyone within my Exchange organization) sends an email to someone with a comcast address including replies. We can send to all other addresses. And can send to those addresses using other smtp or email accounts. This is the error I get:
*******@comcast.net on 7/17/2006 4:04 PM
There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
<geek3.Coakley.local #5.5.0 smtp;521-EHLO/HELO from sender 184.108.40.206 does not map to geek3.coakley.local in DNS>
How do I correct this? I have checked the various blacklist sites, and I cannot find that we have been put on any of them. I note that the difference in the DNS addresses above is geek3.Coakley.local versus geek3.coakley.local is the letter C in Coakley. Is it case sensitive? And if so how can I make this correction?
Please give descriptive instructions as I am only a novice.
Thank you for your help.