[pfx] Re: SASL: Send mail outside my network

Hello.

Check your config values. A basic SASL configuration:

relayhost = [outbound.domain.com]:587
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_security_level = may
smtp_use_tls = yes

Matching credentials in /etc/postfix/sasl_passwd

[outbound.domain.com]:587 username:password

Cheers

On 4/17/2026 7:50 AM, Tommy Berglund via Postfix-users wrote:
> Hi!
> need advice on how to solve the problem of not being able to send mail
> outside my network. Have googled but not managed to find a solution.
> Installed Debian Trixie from Debian page.
> Error message when sending email:
> email postfix/submission/smtpd connect from unknown[192.168.1.44]
> email postfix/submission/smtpd: warning: SASL authentication failure:
> Password verification failed
> email postfix/submission/smtpd: warning: unknown[192.168.1.44]: SASL
> PLAIN authentication failed: authentication failure,
> [email protected]
>
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