[rt-devel] Duplicate message elimination.

[Robert Spier]

Your patch is reversed.  Diff syntax is: diff [flags] <old> <new>

Also, the Message-Id checking you are using is very expensive, as it
will potentially have to load lots of Transactions.

It is probably faster (and potentially easier) to use an external
filter like procmail/formail or Mail::Audit to do this filtering, or
have the mailgate keep a messageid cache.

-R