[Mailman-Users] Forged from headers and non existent lists
stupidmail4me at yahoo.com
Fri Mar 17 21:13:58 CET 2006
You're right. That's a good question. Why is mailman
receiving these messages?
Here's the message that gets sent back:
Your mail for blah at lists.foo.com could not be sent:
no list named "blah" is known by lists.foo.com
For a list of publicly-advertised mailing lists hosted
on this server,
visit this URL:
If this does not resolve your problem, you may write
postmaster at lists.foo.com
mailman-owner at lists.foo.com
lists.foo.com delivers e-mail to registered mailing
and to the administrative addresses defined and
required by IETF
Request for Comments (RFC) 2142 .
Personal e-mail addresses are not offered by this
The Internet Engineering Task Force  (IETF)
oversees the development
of open standards for the Internet community,
including the protocols
and formats employed by Internet mail systems.
For your convenience, your original mail is attached.
 Crocker, D. "Mailbox Names for Common Services,
What can I change so that nothing gets sent?
--- Hans Ulrich Niedermann <hun at n-dimensional.de>
> stupidmail4me <stupidmail4me at yahoo.com> writes:
> > My site is getting a lot of spam sent to my lists.
> > They are being sent from unknown people using
> > from headers. Mailman then sends an email to these
> > forged from headers telling them so and so list
> > doesn't exist. Most of these forged from headers
> > aren't real addresses, so there begins loops of
> > mailman trying to send out a message, and their
> > servers telling mine that address doesn't exist.
> > Is there an option in Mailman to just disregard
> > messages sent to lists that don't exist? I don't
> > to send a message informing them that the list
> > exist, I just want Mailman to ignore it. Is this
> > possible?
> Why does Mailman receive those mails in the first
> There should be no valid alias for those
> non-existing lists and the
> MTA thus should not accept those mails at all. If
> the MTA just returns
> a SMTP error "no such user", no additional mails are
> Hans Ulrich Niedermann
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