Exim Basic Editor Smarthost Support Questions

vaxhax

Member
Nov 3, 2016
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Hey folks,

I have a postfix server on the same internal network as my WHM server. IN THE END, I just want to route every single outgoing mail through the postfix server.
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The only threads I've found about configuring a Smarthost all add routers and transport sections in the Advanced Editor, but I am hoping to avoid that if possible. So:

In the Exim Basic Editor there is a control to enable Smarthost Support! I put my mail server internal IP address there and the Exim service restarts. Excellent, until I send a mail from the command line.

Suddenly, the mail is frozen in the queue and won't route for any destination giving the short error:

[email protected] is undeliverable: The mail server could not deliver mail to [email protected]. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.

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The exim debug output gives quite a lot of info, but to narrow it down the main issue is that every lookup for domain.com fails in each of the router sections.

So it seems the one (Basic Editor) setting is insufficient to route the email. Were all these router sections being checked when Exim thought localhost was the MTA?

What else needs to be done after setting the smarthost IP address in Basic to make it work exactly as it did before? I don't need to do any special domain restriction at this time, just shove everything into postfix.

Thank you very much,
Chris
 

vaxhax

Member
Nov 3, 2016
6
0
1
Texas
cPanel Access Level
Root Administrator
Every time I try to edit that post it won't let me save due to the filter thinking my posting something spamlike, therefore I will reply.

The documentation doesn't seem to indicate anything else is necessary. I'm running 60 (build 15)
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
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Hello @vaxhax,

Could you verify if the "WHM >> Security Center >> SMTP Restrictions" option is enabled on this system? It's documented at:

SMTP Restrictions - Documentation - cPanel Documentation

If so, try disabling it and let us know if the issue persists. Also, if you use CSF, review the "SMTP_BLOCK" setting.

Thank you.
 

vaxhax

Member
Nov 3, 2016
6
0
1
Texas
cPanel Access Level
Root Administrator
Hello @vaxhax,

Could you verify if the "WHM >> Security Center >> SMTP Restrictions" option is enabled on this system? It's documented at:

SMTP Restrictions - Documentation - cPanel Documentation

If so, try disabling it and let us know if the issue persists. Also, if you use CSF, review the "SMTP_BLOCK" setting.

Thank you.
Thanks @cPanelMichael . I did have it enabled, I disabled it. I am not running CSF. After disabling SMTP Restrictions I re-enabled Smarthost via IP.

Attempting to send mail gives the same errors in /var/log/exim_main. What's next? This is a fresh install on a fresh Centos 7.2

Based on those docs, it wouldn't matter anyway (SMTP Restrictions) since I am sending the mail as root.

Thank you,
Chris
 
Last edited:

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,227
463
Hello,

Feel free to open a support ticket using the link in my signature so we can take a closer look. You can post the ticket number here so we can update this thread with the outcome.

Thank you.