Remote Mail Exchanger Rejected Messages Show Up in Local Log

ljj3

Active Member
Nov 7, 2014
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cPanel Access Level
Reseller Owner
Hi... I have host multiple domains in a reseller configuration on a VPS. Most have local mail exchange set up, but several use remote mail exchangers. Everything is working correctly....

One new account is also working correctly - local nameserver, main domain pointing at my server, mail server on remote client system, correct mx records, website functioning correctly, remote mail exchanger working, people getting and sending mail, but I noticed an odd thing I had not seen before in my server's mail delivery logs.

Rejected, obviously spam messages from external sites (like Yahoo, etc) sent to users on the remote mail system seem to show up in my log. Like this:

Please turn on SMTP Authentication in your mail client. (example.com) [xxx.131.11.75]:55554 is not permitted to relay through this server without authentication.

I would have thought that bounces from the remote site would go back to the sender - not to the main domain? Perhaps the remote mail exchanger is missing something?

Thanks, as I said, everything is working, but this just makes me curious....

- Lou
 

ljj3

Active Member
Nov 7, 2014
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3
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cPanel Access Level
Reseller Owner
Let me re-phrase my question, when a remote mail server is active, why would any of the domain's email be processed through the server where it's example.com website is hosted?
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
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Let me re-phrase my question, when a remote mail server is active, why would any of the domain's email be processed through the server where it's example.com website is hosted?
Could you verify which specific log file you see the entries in? For instance, how are you accessing /var/log/exim_mainlog with only reseller access?

Thank you.
 

ljj3

Active Member
Nov 7, 2014
33
3
58
cPanel Access Level
Reseller Owner
Hi - the log I'm looking at is "Mail Delivery Reports" from WHM logged in as the reseller/owner...

As I said, no messages show up in the log except ones bounced by the final destination...

- Lou
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
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I suggest reporting this issue to your web hosting provider so they can take a closer look at /var/log/exim_mainlog in order to troubleshoot the issue.

Thank you.