[Mailman-Users] Undeliverable emails!

[Genevieve Buri]

I reconfigured mailman with --with-mail-gid=mailman.
But it didn't do nothing, same mistake...was it mailnull ?
Because in sendmail.cf, I see :

**this is in comment**
default UID (can be username or userid:groupid)
ODefaultUser=mailnull

I'm so confused, but I feel like I'm really close to the end!!! :)

Thanks again
Genevieve