On 2/3/26 10:28, dap1--- via Mailman-users wrote:
I am going in circles between postfix issues and mailman. However, before I 
continue with postfix debugging I want to resolve this first as it may be 
related for all I know. I'm getting this error in the postfix mail log:

2026-02-01T11:00:10.106626-05:00 dap002 postfix/local[113730]: 01623500076: 
to=<[email protected]>, orig_to=<mailman>, relay=local, delay=0.16, de
lays=0.11/0.01/0/0.04, dsn=5.2.0, status=bounced (cannot update mailbox 
/var/mail/mailman for user mailman. cannot open file: Permission denied)

I'm not sure why mailman is trying to write to that file but it is owned by 
root:mail. It is obvious why permission is denied to mailman. Is that directory 
really part of mailman3 and if so what should ownership and permissions be? If 
not then why is mailman trying to write to it? That path does not appear in any 
of the files in /etc/mailman3.

Postfix is trying to deliver mail to a mailman@... address to the local user `mailman`. The user:group of the file /var/lib/mailman should be mailman:mail. if you `sudo chown mailman /var/lib/mailman`, those messages will be delivered to that mailbox and you can see what they are.

What are all the log messages from `grep 01623500076 /var/log/mail.log`?

Possibly you have set

site_owner: mailman

in mailman.cfg which would cause Mailman to send various notices to the local `mailman` user.

--
Mark Sapiro <[email protected]>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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