On 12/18/24 11:26, ski--- via Mailman-Users wrote:
Help.
I have been using mailman at hostmonster many years.  Recently, email delivery to 
external domains stopped (yes, DNS / SPF/ DKIM/ DMARC all good).  Hostmonster says it is 
a IP address issues Hostmonster - "The emails sent via Mailman use the IP address 
127.0.0.1, which is the default IP address of the server. Unfortunately, when emails from 
this address are dropped due to mailing list restrictions, it becomes challenging to lift 
these restrictions, thereby preventing us from resolving the Mailman-related issues 
effectively. "
  Has anyone else experienced this problem?  Is there a solution?

It seems Hostmonster doesn't have a clue about how to support Mailman. Do they use cPanel. Many hosting services use cPanel, and while some do support Mailman, others offer Mailman lists only because they come with cPanel and don't have any interest in actually supporting it.

Mailman delivers mail via an outgoing MTA, most often and by default this is the MTA listening on localhost (127.0.0.1) port 25. Mailman has logs `smtp` and `smtp-failure` that can help diagnose delivery failures as can information in the MTA's logs. Why the fact that Mailman connects to the MTA at 127.0.0.1 complicates this in any way is not something I understand.

Hopefully you can find someone at hostmonster that has a clue.

If this is cPanel mailman, see https://wiki.list.org/DOC/Mailman%20and%20CPanel

--
Mark Sapiro <m...@msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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