Hello,

  I've got SA with a few features installed and it's working great and
has been for a while.

  However, over the past few weeks I've had a few select users complain
about receiving 3-4 thousand bounce messages per day from what appears
to be mail delivery error messages.  From what I can tell it's the
spammer spoofing the sender with their user ID and the messages they
receive are the servers responding with an unknown user or the like.

 Does anyone know a work around for this?

 Thanks
   Scott

One method to reduce backscatter is bounce address tab validation (BATV). I managed to hack MIMEDefang to do BATV (http://www.divms.uiowa.edu/~boyken/mdbshowto.html), and it works pretty well.

Karl Boyken

--
Karl Boyken, system administrator karl-boy...@uiowa.edu 303A MLH, Dept. of Comp. Sci. http://www.cs.uiowa.edu/~boyken/ The U. of Iowa, Iowa City, IA 52242 319-335-2730 (voice) 319-335-3668 (fax)

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

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