unknown local-part "m2k94f9za3.fsf" in domain

[Bud Rogers <budr@sirinet.net>]

Pretty often mailq turns up an outgoing message from my Mailer-Daemon 
about an undeliverable message.  The undeliverable message is always 
spam of some kind, and always addressed to a non-existent user like the 
one in the subject.   The addressee is always 
m2[a-z0-9]*.fsf@twocups.sirinet.net.

I never see the incoming spam, just the outgoing Mailer-Daemon 
messages.  They usually wind up frozen because the spammer site is 
refusing connections.  Big surprise there.

I see between five and ten of these a week.  This is making me paranoid 
because I'm not sure exactly what's going on.  I'm fairly certain I 
have relaying disabled in exim.  I can't figure out what the spammers 
are getting out of this and that  worries me.

-- 
Bud Rogers <budr@sirinet.net>   http://www.sirinet.net/~budr
All things in moderation.  And not too much moderation either.