Hi Michael,
Thanks for your reply
Michael Breton elucidated on 14/11/06 20:59:
I forgot to ask, why did I receive the bounce email for Paypal's
mistake? (I had not expected to receive it now I have SPF setup on
jguk.org) Is there a way to avoid getting it? I presume their MTA
generated a fresh email or some such..?
You received the bounce, because after Paypal's unsuccessful attempt to
send you the original message, their MTA created a bounce, which, by
definition, always has an empty MAIL FROM, which is not subjected to the
SPF requirements like the original message was.
Just to check I understand correctly. Do you mean the bounce message
(the actual one that I received, from MAILER-DAEMON(_at_)paypal(_dot_)com) had a
missing MAIL FROM? (That's the Return-Path: <>). Is it considered
acceptable to send messages with such an missing MAIL FROM?
Is there a reason not to just Reject any MAIL FROM <> messages? It
seems like a loop hole, which a spammer could exploit to send someone
messages.
Kind regards
Jon
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