Postfix relayhost Authentication

#1 setup a password maps file

vi /etc/postfix/sasl_passwd

mailserver.com      username:password

#2 fix owner and permissions

chown root:root /etc/postfix/sasl_passwd; chmod 600 /etc/postfix_sasl_passwd

postmap /etc/postfix/sasl_passwd

#3 edit /etc/postfix/main.cf

relayhost = mail.ispserver.com
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =

#4 postfix reload

and you are done!


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