Returned mail: see transcript for details （2024.03.18）
The original message was received at Mon, 18 Mar 2024 09:45:04 +0200 (EET)
from jutikka.iki.fi [IPv6:2001:67c:2b0:1c1:0:0:0:198]
----- The following addresses had permanent fatal errors -----
olli.pyylampi@gmail.com
(reason: 550-5.7.26 This mail has been blocked because the sender is unauthenticated.)
(expanded from:
----- Transcript of session follows -----
... while talking to gmail-smtp-in.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::38] = 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 k14-20020a05651239ce00b00513e867a855si669335lfu.434 - gsmtp
554 5.0.0 Service unavailable
