Dnia  4.10.2025 o godz. 14:55:00 Gerard Seibert via Postfix-users pisze:
> *Trusted TLS connection established to smtp.gmail.com
> <http://smtp.gmail.com>[74.125.138.108]:587: TLSv1.3 with cipher
> TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature
> ECDSA (prime256v1) server-digest SHA256 mystic postfix/smtp[26609]:
> warning: SASL authentication failure: No worthy mechs found.*
> 
> Output of postconf -A
> cyrus
> 
> and  postconf -a
> cyrus
> dovecot
> 
> I have attached the output of 'postconf -nf' and 'Mf'. I do not understand
> what the "No worthy mechs found" is trying to tell me.

Gmail requires authentication either via OAuth2 or "application password"
that you have to generate on your Google account (the latter is possible
only for accounts that have 2FA turned on). It doesn't support regular
password authentication.

Are you using either of these?
-- 
Regards,
   Jaroslaw Rafa
   [email protected]
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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