Postfix send through SMTP relay

    • Postfix send through SMTP relay

      This allows Postfix to send emails through a third party SMTP relay like Gmail. I know on Debian based system you need libsasl2-modules installed.

      First create a SASL credential file, /etc/postfix/sasl_passwd:

      Source Code

      1. []:587 $$PASS

      Generate a map file:
      postmap /etc/postfix/sasl_passwd
      It'll generate a /etc/postfix/sasl_passwd.db file.

      Let's secure those two files:
      chmod 0600 /etc/postfix/sasl_passwd*

      Add following lines to your /etc/postfix/

      Source Code: /etc/postfix/

      1. relayhost = []:587
      2. smtp_sasl_auth_enable = yes
      3. smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
      4. smtp_sasl_security_options = noanonymous
      5. #smtp_use_tls = yes
      6. smtp_tls_security_level = may
      7. header_size_limit = 4096000

      Restart Postfix.
      I like cars and taking pictures! 8)