Returned mail: see transcript for details （2024.03.30）
The original message was received at Fri, 29 Mar 2024 23:33:16 +0200 (EET)
from root@eilopu.iki.fi [IPv6:2a0b:5c81:1c1:0:0:0:0:39]
----- The following addresses had permanent fatal errors -----
vianello.anna@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 p11-20020a056512234b00b00515d16b2ab7si689122lfu.318 - gsmtp
554 5.0.0 Service unavailable
