Undelivered Mail Returned to Sender （2024.03.18）
This is the mail system at host sinikuusama2.dnainternet.net.
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
550-5.7.26 The MAIL FROM domain [tundra2000.com] has an SPF record with a
hard 550-5.7.26 fail policy (-all) but it fails to pass SPF checks with the
ip: 550-5.7.26 [83.102.40.152]. To best protect our users from spam and
phishing, 550-5.7.26 the message has been blocked. For instructions on
setting up 550-5.7.26 authentication, go to 550 5.7.26
https://support.google.com/mail/answer/81126#authentication
r28-20020a2e8e3c000000b002d47bf4f137si2352303ljk.450 - gsmtp (in reply to
end of DATA command)
