michaelof--- via Postfix-users:
> 2024-02-22T17:49:57.074140+01:00 vserver postfix/smtps/smtpd[165894]: connect
> from <FAILED: sender-dns-name[IPv4]>
> 2024-02-22T17:49:57.177663+01:00 vserver postfix/smtps/smtpd[165894]:
> warning: <FAILED: sender-dns-name[IPv4]> : SASL LOGIN authentication failed:
> Invalid authentication mechanism
Your smtpd_sasl_security_options setting appears to allow plaintext
mechanisms:
> -o smtpd_sasl_security_options=noanonymous
But with TLS turned on, Postfix is supposed to use
smtpd_sasl_tls_security_options.
The default setting is
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
which would allow plaintext mechanisms, with y9our
smtpd_sasl_security_options=noanonymous setting.
What could be wrong:
1) You nay have smtpd_sasl_tls_security_options in main.cf
2) Your SASL backend may not support the LOGIN plaintext
mechanism.
3) You may have an smtpd_sasl_mechanism_filter setting
that does not allow "login". The default seting is
smtpd_sasl_mechanism_filter = !external, static:rest
which allows all mechanisms except 'external'.
Wietse
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