On 22/06/2022 11:14, Robert Steinmetz via Exim-users wrote:
I'm getting some messages bounced from google with the following message
host aspmx.l.google.com [2607:f8b0:4002:c08::1a]
SMTP error from remote mail server after pipelined end of data:
550-5.7.1 [2603:3001:600:4a00::8a4d] Our system has detected
that this message
550-5.7.1 does not meet IPv6 sending guidelines regarding PTR
records and
550-5.7.1 authentication. Please review
550-5.7.1https://support.google.com/mail/?p=IPv6AuthError for
more information
550 5.7.1 .
bd16-20020a05690c011000b00317b6ac906asi14707597ywb.433 - gsmtp
There are no IPv6 records set up and I've gone through with my ISP
(Comcast) to check the PTR records. The odd thing is that this only
seems to affect some users and usually those that have their own
domain. Standard gmail.com accounts seem unaffected.
I'd appreciate any tips on trouble shooting this problem.
For starters, I guess you need a reverse DNS (PTR record) for that
sending host (2603:3001:600:4a00::8a4d). Your SPF configuration should
also list it as a valid sender.
Or you could deliver only with IPv4. This can be done with an "interface
= " in your transport.
--
QOTD:
"I thought I saw a unicorn on the way over, but it was just a
horse with one of the horns broken off."
Eduardo M KALINOWSKI
edua...@kalinowski.com.br
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