Fwd:

[Shauna Swenson <shauna_swenson @ yahoo . com>]

Hi!

I'm not sure if this question is appropriate for this
list. If not, I would appreciate it if you would guide
me in the right direction.

I've got a moderated listserv. Someone sent
unsolicited mail to the list, set the list owner as
the sender, and bypassed the approval.

How do I prevent this from happening again?

Here's what I found in the mail log: 
==
Feb  8 16:49:03 <host> sendmail[17732]: QAA17732:
Authentication-Warning: <host.domain>: majordom set
sender to owner-majordomo using -f
--

According to the sendmail man page, only a trusted
user (normally root, daemon, and network) can use the
"-f" option in that manner.

The user majordom has a UID of 43 and a GID of 41
which is not the same as root's or daemon's. "network"
is not in the passwd file.

I would appreciate all the information you can
provide. Thank you.
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