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perl-Mail-SRS - Sender Rewriting Scheme for SMTP forwarders
- Description:
The Sender Rewriting Scheme preserves .forward functionality in an
SPF-compliant world.
SPF requires the SMTP client IP to match the envelope sender
(return-path). When a message is forwarded through an intermediate
server, that intermediate server may need to rewrite the return-path to
remain SPF compliant. If the message bounces, that intermediate server
needs to validate the bounce and forward the bounce to the original
sender.
SRS provides a convention for return-path rewriting that allows
multiple forwarding servers to compact the return-path. SRS also
provides an authentication mechanism to ensure that purported bounces
are not arbitrarily forwarded.
SRS is documented at http://www.openspf.org/SRS
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