Ed

Mailman, Postfix, Gentoo

I tried to set up mailman on Gentoo, using Postfix.

The Symptom: a bounce with this text:

    <listname@hostname>: Command died with status 2:
    "/usr/local/mailman/mail/mailman post everyone". Command output: Group
    mismatch error.  Mailman expected the mail wrapper script to be
    executed as group "mailman", but the system's mail server executed the
    mail script as group "nobody".  Try tweaking the mail server to run the
    script as group "mailman", or re-run configure,  providing the command
    line option -with-mail-gid=nobody'.

The solution:

Instead of adding mailman aliases to /etc/aliases, add them to /usr/local/mailman/data/aliases. Then modify /etc/postfix/main.cf:

  +alias_maps = hash:/etc/mail/aliases, hash:/usr/local/mailman/data/aliases
  +alias_database = hash:/etc/mail/aliases, hash:/usr/local/mailman/data/aliases

Yes, you need both lines.

Then make sure that /usr/local/mailman/data/aliases is owned by mailman.mailman, run newaliases, run 'postfix reload', and try again.