Markus Stumpf wrote:
On Thu, Sep 16, 2004 at 11:02:00PM +0200, Claus Färber wrote:
It can't break forwarding for bounce message because bounce messages
don't have a domain name in their 2821.MAILFROM.
Hmmm ... I can't find it anymore right now, but shouldn't SPF conform
bounces have a non empty envelope-sender, as a workaropund to prevent
spammers sending their messages with <> only?
Hello? Ever heard of HELO? :) Sending with en empty envelope-from, to try
and circumvent SPF, is pointless: checks are done against HELO, in that case
(as if tested against, say, postmaster(_at_)HELO). Consequently, since there is
nothing to prevent, there is nothing to send "non empty" either (where empty
was the case).
- Mark
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