Hello,
I have configured postfix, dovecot with ssl from letsnecrypt. It works
fine, but gets rejected when sending mails to gmail, with following rejection
message:
Reporting-MTA: dns; xxx.com
X-Postfix-Queue-ID: 0350A19652F
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Mon, 13 Jun 2022 08:45:06 +0000 (UTC)
Final-Recipient: rfc822; [email protected]
Original-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.1
Remote-MTA: dns; aspmx.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [2a01:4f9:c012:7b57::1] Our system has
detected that this message does 550-5.7.1 not meet IPv6 sending guidelines
regarding PTR records and 550-5.7.1 authentication. Please review 550-5.7.1
https://support.google.com/mail/?p=IPv6AuthError for more information 550
5.7.1 . x8-20020a7bc208000000b0038ffbcf8a3bsi7451922wmi.106 – gsmtp
Please suggest how to resolve this. Initially smtp_tls_security_level = may,
was verify and sending emails were getting rejected, then we made it may. After
that we for rejection emails from google.
Regards,
Ranjan
