Message is frozin

[Paul Yeatman <pyeatman@ucsd.edu>]

Hi, a want to quickly check the list here to see if anyone knows anything
about the following.  I came in today and had 4 or 5 messages with subject
line "Message frozen" and contents as such:

    Envelope-to: postmaster@genesis.ucsd.edu
    From: Mail Delivery System <Mailer-Daemon@genesis.ucsd.edu>
    To: postmaster@genesis.ucsd.edu
    Subject: Message frozen
    Date: Tue, 18 Jun 2002 04:02:05 -0700

    Message 17KGkP-0001AK-01 has been frozen. The sender is <>.

    The following address(es) have yet to be delivered:
      deliver.pyeatman@genesis.ucsd.edu: unknown local-part "deliver.pyeatman" in
    +domain "genesis.ucsd.edu"

When I check /var/log/exim/maillog, there are lots of "Message is frozen"
messages from multiple message ID's.  Each half hour, it complains about the
same set of messages.  For instance, if I grep for the message ID
of the above message in the maillog, a new "Message is frozen" message is
repeated each half hour:

    2002-06-18 06:38:02 17KGkP-0001AK-01 Message is frozen
    2002-06-18 07:08:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 07:38:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 08:08:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 08:38:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 09:08:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 09:38:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 10:08:01 17KGkP-0001AK-01 Message is frozen
    2002-06-18 10:38:01 17KGkP-0001AK-01 Message is frozen

Anyone have any idea what is going on, what to do about it or how to
stop it?  Is it an attack?

Thanks!

-- 
Paul Yeatman          (858) 534-9896           pyeatman@ucsd.edu


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