Hi,

I've just installed mailman3 (well, mailman3-full) on a Debian 11 host from Debian packages. I thought I'd gone through /etc/mailman3/mailman.cfg thoroughly, but I am seeing the From: address changeme@example.com in some administrative notifications.

Now, when I search for help on this everything says that I have not set site_owner in /etc/mailman3/mailman.cfg, but I have!

As an example of what I am seeing, when I use the web interface to unsubscribe a list member, the member themself gets a notification as expected:

From: testing-bounces@lists.strugglers.net
To: andy-again@strugglers.net
Subject: You have been unsubscribed from the Testing mailing list

but the list's owner gets one from "changeme@example.com":

From: changeme@example.com
To: testing-owner@lists.strugglers.net
Subject: Testing unsubscription notification

andy-again2@strugglers.net has been removed from Testing.

I can't for the life of me work out where this is coming from:

$ sudo ack site_owner /etc/mailman3 /etc/mailman3/mailman.cfg 28:site_owner: postmaster@lists.strugglers.net $ sudo ack changeme /etc/mailman3

(no output)

It's not in any of the sqlite DBs either (still on sqlite while testing things out):

$ sudo sqlite3 /var/lib/mailman3/data/mailman.db .dump | grep -i changeme $ sudo sqlite3 /var/lib/mailman3/web/mailman3web.db .dump | grep -i changeme

So where can this possibly be coming from?

I have not yet configured the MTA (Exim) for delivering to Mailman, and I haven't done anything special about sending settings:

[mta] # … outgoing: mailman.mta.deliver.deliver smtp_host: localhost smtp_port: 25 configuration: python:mailman.config.exim4

Thanks, Andy