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When SPF is incompatible with Sender-ID

To: ietf-mxcomp@xxxxxxx
Subject: When SPF is incompatible with Sender-ID
From: Tony Finch <dot@xxxxxxxx>
Date: Tue, 10 Aug 2004 20:10:47 +0100
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You can use SPF records and a custom DNS server to allow SPF-aware
recipients to verify signed envelope return paths using the exists
mechanism. This SPF record does not work for Sender-ID because the PRA
will not be signed so will FAIL.

Tony.
-- 
f.a.n.finch  <dot@xxxxxxxx>  http://dotat.at/
BERWICK ON TWEED TO WHITBY: WEST OR SOUTHWEST 2 OR 3 INCREASING 3 OR 4. FAIR.
GOOD. SLIGHT OR SMOOTH.

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