On 6/13/25 01:59, Florian Sukup wrote:


On 6/13/25 01:58, Mark Sapiro wrote:

but I'm at a loss to understand the issue, unless your /etc/postfix/master.cf is missing an uncommented entry for lmtp like
```
lmtp      unix  -       -       y       -       -       lmtp
```


I found it there, here is my master.cf:

I realized after the fact that that probably wasn't the issue because it probably would have logged an error.


mailman   unix  -       n       n       -       -       pipe
  flags=FRX user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Is the last line a problem? It seems to be from mailman2.


It's a Debian thing for an unsupported MM 2.1 process to deliver mail to Mailman. It doesn't do any harm if it's not referenced in main.cf.


Is there a possibility to debug in more detail? To find out when and where it takes the wrong turn?

I'm unable to see where this is going wrong. I think it is a Postfix issue, not a Mailman issue per se, and while we make a best effort to help with Postfix-Mailman integration issues we are not the primary support resource for Postfix which is the postfix-us...@postfix.org mailing list. See https://www.postfix.org/lists.html for info on subscribing and posting.

Also, since you are dealing with Debian packages, the primary support resource is Debian. See https://wiki.list.org/x/12812344

--
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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