On 2022-10-06 at 22:25:26 UTC-0400 (Fri, 7 Oct 2022 10:25:26 +0800)
Henrik Park <hen...@simplemail.co.in>
is rumored to have said:
Hello,
If my server forward the messages without implementing SRS, but
doesn't change any content in messages so they won't break DKIM, will
this forwarding be accepted by the destination mailserver?
That is dependent on the specific destination mailserver AND the sender
domain. SRS only exists because SPF is broken by simple forwarding, and
the problem of broken SPF is not solved by DKIM. If the sender domain
SPF ends in '-all' or '~all' a destination server might still distrust
the message. This is in part because SPF only involves the envelope and
client IP, and so can be checked before the DATA stage of the SMTP
transaction. It's less costly than checking DKIM, which requires
analysis of message data.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
