Documentation / Postfix Engineering

Postfix and Dovecot Integration

Connect SMTP AUTH and local delivery safely.

v2.4Updated 2026-07-20Production guidance

Production note: Back up configuration, run postfix check, and stage changes before reloading.

Dovecot authentication socket

service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0660
    user = postfix
    group = postfix
  }
}

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth

virtual_transport = lmtp:unix:private/dovecot-lmtp

Check socket permissions, Dovecot logs, Postfix chroot paths, and authentication with a controlled submission test.