[MM3-users] Re: Xapian error on RHEL9 - module 'xapian' has no attribute 'QueryParser'

I looked at my notes and there was one other thing. There's an issue with mailman and postfix when performing email commands.

I had to set the recipient_delimiter in /etc/postfix/main.cf

recipient_delimiter = +

I believe this is included by default in Debian/Ubuntu after installing Postfix.

I had less than a handful of lists in my Mailman 2 server, so I didn't perform a migration. I just re-created my lists and configured them as closely as possible as they were in Mailman 2.