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I have a problem with sending mail from my fileserver (named Arkiv, for LAN access only) to my mailserver (named Post, in a DMZ). I basically only want to do this to aggregate my logcheck, etc mails in one mailbox, that is also accessible from the outside.
The fileserver is separated from the mailserver by a firewall where only sendmail connections orginating from the fileserver are allowed through (as well as ssh). The fileserver is not allowed any direct contact with the Internet.
Sending mail locally between users on the fileserver works fine and when I try to "telnet post 25" to the mailserver I can manually send mail through.
The problems start when I try to send an mail in any other way between the boxes. I then get the message accepted for delivery but then the host name resolve fails for some reason.
In var/log/maillog the attemted mail submission looks like this:
Should this mailertable contain the host I am using? or the host that keeps bouncing mail back with Hostname lookup failure? I have about 6 ip's that bounce mail back with either hostname lookup failure, or Timeout exceeded. All other ip's can send mail just fine. I use sendmail on slackware 12.2 and earthlink and netcom.com as well as mindspring.com keep bouncing my mail back with these errors. I run through a motorola router (DSL) and just can't seem to figure out how to send email to these certain ip's. They can send email into me, but I can't send to them. Is there anything I can do to fix this?
Last edited by mirader9813; 05-14-2009 at 03:08 PM.
Reason: add more info