[Mailman-Users] Messages not reaching mailman

[Steve]

Fresh install of FC2 RPM. Configured by Plesk software (it simply
added add_virtualhost('myhost') to bottom of mm_cfg.py).

Using SMTPDirect but I am not sure what MTA is being used (and would
like to know how to find out).

Checked the FAQ and qrunner is fine (according to the log).

SMTP log entries only correspond to subscription requests--not mails
to the list.

I have set my DEFAULTS to www.myhost.net and myhost.net.

Switching from SMTPDirect to Sendmail does nothing.

What could be going wrong?

-Steve