Not receiving e-mails
Server #1 - RedHat 7.3 with APF 0.9.6 & BFD (WHM 10.6.0 cPanel 10.8.0-S21)
Server #2 - RedHat Enterprise 3 with APF 0.9.6 & BFD (WHM 10.6.0 cPanel 10.6.0-R55)
Both servers have ping and traceroute disabled. Have not made any changes to any configurations since 2/11/06 when I reinstalled APF and BFD to try and correct this problem. The first date that server #1 started witht his same problem was 2/28/06.
Situation:
I have looking for a long time for an answer to this problem. I have two servers that have a similar problem, but it only seems to be when its related to the one clients domain. Server #1 is only in this because I setup a forward on one of my accounts to try and get mail to this particular client that can't seem to get mail on server #2.
This only seems to happen on one account located on server #2. The client can send mail to anywhere (with the exception of some yahoo and msn accoutns, but thats unrelated I believe) and can receive mail from almost everywhere. They can't receive e-mail from large insurance companies (BlueCross BlueShield is one example). When this first happened I setup a separate account on server #1 and then had at that time the one company that could not send the emails to server #2 send them to server #1 where they were accepted and then auto forwarded to the right account on server #2. Now since 2/28/06 the auto forward does not work nor the direct path to server #2. I can send mail to both servers from gmail, yahoo, hotmail, and several ISP accounts from my personal relations. They get mail, just not all of it.
Now what seems to be obvious, I can turn off the APF firewall and the messages roll through with out a problem. Turn APF back on, mail stops and returns back to the state it was before APF was disabled. I have upgraded APF three times since this first started in the fall of 2005. Here is what I have done with APF and the results:
- Added each IP of the troubled mail server to the allow_hosts file in APF (Still fails)
- Disabled all the .network files for APF (still fails)
- Disabled all the .network files and turned off one at a time, AD, BFD, and DShield (still fails)
- Flushed every entry in the deny_hosts file (still fails)
- Checked the logs for any DROP packets with the IPs of the blocked emails (none found)
I do have SpamAssassin installed and enabled, but the messages never even arrive or enter the server to be affected by that from what I can see.
I am open to any and all suggestions that might help but of course not compromise my system.
