On Mon, 28 Feb 2005, Keith Moore wrote:
could you explain the backscatter problem? I'm not sure what you're referring
to.
If a spammer or a virus sends out forged email (a "joe job") a certain
proportion of it is likely to be rejected, e.g. because of incorrect
recipient addresses or anti-virus or anti-spam or anti-forgery checks. If
the rejection results in a bounce message the bounce will be sent to the
apparent sender of the message, who is an innocent third party and the
victim of the joe job. These bounces are backscatter from forged spam, aka
collateral spam.
Tony.
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