Reverse DNS Entry for Mail Server
Posted on 2006-11-28
When I email Comcast the email bounces back with the following:
Your message did not reach some or all of the intended recipients.
Sent: 11/27/2006 3:49 PM
The following recipient(s) could not be reached:
addr...@comcast.net on 11/27/2006 3:49 PM
There was a SMTP communication problem with the recipient's
email server. Please contact your system administrator.
<my.mail.server.net #5.5.0 smtp;521-EHLO/HELO from sender
18.104.22.168 does not map to my.mail.server.net in DNS>
The IP in the NDR is that of my firewall. What are the options for
pointing the IP/address to the external IP of the mailserver itself?
The mail appears to come from the correct computer
my.mail.ser...@mydomain.net, but the IP address associated is that of
the firewall gateway address. I have a block of 30 addresses and the
mailservers are NATted behind the firewall. How would I change the IP that it appears from the FW to the actual server public IP?