Re: Misdelivered messages

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Recipient addresses don't have to appear anywhere in the message.
And in spam the To: header is often garbage.  Ignore that.

Look at the system log records written by your MTA (Postfix?) to
see who the recipients were.

Joseph Brennan
Lead Email Systems Engineer
Columbia University Information Technology





--On Wednesday, May 23, 2007 9:37 -0400 Dana Canfield <canfield@xxxxxxxxx> wrote:

In the past week or so, we've had trouble with spam being delivered to
the wrong recipients.  It's difficult to explain, so I'll use an example:

hackxx@xxxxxxxxx and xxmelser@xxxxxxxxx are local users receiving
hundreds of spam per hour.  None of it is addressed to them.  Their email
addresses don't appear anywhere in the message source.  The messages in
hackxx's account appear to be the same messages that xxmelser is
receiving.  Most of the misdirected messages seem to be addressed to
other local users, such as xxmilton@xxxxxxxxx or foxworthxx@xxxxxxxxxx
To further confuse the issue, this only happens with spam.  A legitimate
message mailed to xxmilton@xxxxxxxxx goes through to xxmilton's account
and doesn't appear in the other users' mailboxes.  The *only* clue I have
found is that most of these spams that get misdirected have a gap between
the To: and the address in the message header, like this:
To:           <foxworthxx@xxxxxxxxx>

Does anyone have any clue what might be going on here?

Thanks
DC
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