port7 – co – uk

This page explains how to configure Postfix on a Debian system to send mail through another mail server that requires a username and password. The motivation for this document is my frustration for the lack of a complete document explaining this simple and common setup.

So here goes…

• Install Packages
• apt-get install postfix libsasl2-modules
• Configure main.cf
• Insert the following lines:

smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
smtp_use_tls = yes

• Create password file
• echo “smtp.myisp.com myusername:mypassword” > /etc/postfix/sasl_passwd
• postmap /etc/postfix/sasl_passwd
• Restart Postfix
• /etc/init.d/postfix restart
• Test