Returned mail: see transcript for details （2024.03.24）
The original message was received at Sun, 24 Mar 2024 09:01:08 +0200 (EET)
from ybxxqq54.secure.ne.jp [27.34.153.54]
----- The following addresses had permanent fatal errors -----
eveliina.kytomaki@turunkonservatorio.fi
(reason: 550-5.7.26 This mail has been blocked because the sender is unauthenticated.)
(expanded from:
----- Transcript of session follows -----
... while talking to aspmx.l.google.com.:
>>> DATA
<<< 550-5.7.26 This mail has been blocked because the sender is unauthenticated.
<<< 550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM.
<<< 550-5.7.26
<<< 550-5.7.26 Authentication results:
<<< 550-5.7.26 DKIM = did not pass
<<< 550-5.7.26 SPF [tundra2000.com] with ip: [2a0b:5c81:1c1::39] = did not pass
<<< 550-5.7.26
<<< 550-5.7.26 For instructions on setting up authentication, go to
<<< 550 5.7.26 https://support.google.com/mail/answer/81126#authentication d21-20020a196b15000000b00513a44d1132si835131lfa.600 - gsmtp
554 5.0.0 Service unavailable
