Okay, after an old Gentoo server died that was running mailman happily for
years with sendmail, I rebuilt things on Ubuntu using a stock postfix with a
custom-compiled mailman. The web interface all looks fine - the lists and
their users are there - and the aliases are in place. But mail coming in
disappears without an error message to tell me why. For instance:
Mar 31 10:37:13 green postfix/local: 4E92B17FBEA: to=<xyz-announce at mm.xyz.org>, relay=local, delay=0.45,
delays=0.02/0.02/0/0.4, dsn=2.0.0, status=sent (delivered to command: /web/mailman/mail/mailman post xyz-announce)
Nothing happens further. No error message shows in any system log.
Now, obviously I've set up something wrong. But how do I get some useful
debugging messages so I can get properly clued here?