While spam and worms that forge the recipient's address as sender are old hat,
this evening I got a copy of Klez with postmaster(_at_)[my(_dot_)site] forged
as the
sender and even some opening text that
<someaddressIhaveneverheardofmuchlesswrittento(_at_)famousbig(_dot_)domain> is
an unknown
user and "Returned mail" as the subject.
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