On Wed 30/Dec/2020 22:06:01 +0100 John R Levine wrote:
We would like to close this ticket by Dec 15, two weeks from now, so short
trenchant comments are welcome.
Ticket #1 is about SPF alignment. We need to replace references to 4408 with
7408, ando clarify what if anything we do with SPF HELO checks if
the MAIL FROM is null. One possibility is to say only MAIL FROM SPF counts,
if you want to align your bounces, sign them. The other is to explicitly say
that HELO alignment is OK on bounces.
I didn't hear a lot of strong opinions, but I think they leaned in the
direction of only checking the MAIL FROM, since the name of the MTA often is
unrelated to the From: domain.
This means that if you want your bounces to be DMARC aligned, they'd need DKIM
signatures.
Bounces with HELO mta.example.com should have From: postmas...@mta.example.com,
where example.com may be a virtual domain or the "real" domain name, depending
on the configuration.
Best
Ale
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