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] > > _______________________________________________ > Postfix-users mailing list [email protected] > To unsubscribe send an email [email protected]
_______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
