Can't send mail to gmail account after upgrading motherboard

I was sending a message to my mom and got this back in my inbox:

This is the mail system at host mysite.tld.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<>: host[2a00:1450:4010:c05::1a] said: 550-5.7.1
    [2001:983:8610:1:ee68:399c:8145:5d32] Our system has detected that
    550-5.7.1 this message does not meet IPv6 sending guidelines regarding PTR
    550-5.7.1 records and authentication. Please review 550-5.7.1 for more information 550
    5.7.1 . 23-v6si1795890lfy.259 - gsmtp (in reply to end of DATA command)

You have to set the values the dns values correctly. Or maybe disable the ip6 for postfix.

1 Like

Oh I see what happened.
I upgraded my motherboard so I got a new IPv6 address.


Reminder to myself: do not give IPv6 addresses of my client computer when asked for my mail server. :neutral_face: