Dear Eduardo,
Am 27.08.24 um 12:56 schrieb Eduardo Diaz Comellas via mailop:
I've got a couple of complains from customers saying that the vacation
message is not being received by Gmail users. Our email service is quite
standard, with dovecot+sieve processing the email storage and
autoresponders.
I've confirmed that the problem is true:
2024-08-27 11:08:09 1sisBN-002eWx-KM <= <> H=(mydovecot.host) [172.30.6.182]
P=esmtp K S=1087 id=dovecot-sieve-1724749689-16845...@mydovecot.host
2024-08-27 11:08:10 1sisBN-002eWx-KM ** randomgmailu...@gmail.com R=hubbed_hosts
T=remote_smtp H=gmail-smtp-in.l.google.com [173.194.76.27]
X=TLS1.3:ECDHE_X25519__ECDSA_SECP256R1_SHA256__AES_256_GCM:256 CV=yes
DN="CN=mx.google.com": SMTP error from remote mail server after pipelined end
of data: 550-5.7.26 Your email has been blocked because the sender is
unauthenticated.\n550-5.7.26 Gmail requires all senders to authenticate with either SPF
or DKIM.\n550-5.7.26\n550-5.7.26 Authentication results:\n550-5.7.26 DKIM = did not
pass\n550-5.7.26 SPF [] with ip: [555.555.555.555] = did not pass\n550-5.7.26\n550-5.7.26
For instructions on setting up authentication, go to\n550 5.7.26
https://support.google.com/mail/answer/81126#authentication
ffacd0b8rr97d-373081420c7si4806836f8f.262 - gsmtp 2024-08-27 11:08:10 1sisBN-002eWx-KM
Frozen (delivery error message)
I think that sending the vacation messages with null sender is an
standard practise and the best way to avoid loops. I've found no
problems with any other email providers: only gmail is blocking this
messages.
Does anyone have this issue? How do you deal with it?
Just set the SPF, like `"v=spf1 a -all"`, for the server (entry for
555.555.555.555).
Kind regards,
Paul
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