In <buh72a$g2t$1(_at_)sea(_dot_)gmane(_dot_)org> "Za'mbori, Zolta'n"
<zamboriz(_at_)axelero(_dot_)hu> writes:
Mark Tranchant wrote:
One of my users tried to send a hallmark.com e-card to one of my
other users. Hallmark sends the card with an envelope sender of the
supplied mail address (my domain) but from their server and
therefore my server blocked it.
I think the correct solution is that hallmark change its 'mail from' syntax:
MAIL FROM:<@hallmark.domain:card-sender(_at_)example1>
According to RFC2821, source routing SHOULD NOT be used my mailers.
Although MTAs MUST accept such a syntax, they SHOULD ignore the
routing and use only the last part.
Does anyone know off-hand how source routing interacts with SPF? I
would hope that MTAs would react to the above MAIL FROM: by passing
SPF just card-sender(_at_)example1(_dot_)
-wayne
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