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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… Continue Reading