Greetings, I am "lucky" enough to have an ISP that blocks outbound port 25 traffic. Fortunately, inbound is wide open. However, I am not able to configure Postfix 2.1.5 to successfully use my ISP mail server as a relayhost. I get a reply in my logs that states: warning: SASL authentication failure: No worthy mechs found Authentication failed: cannot SASL authenticate to server smtp.sbcglobal.yahoo.com[68.142.229.41]: no mechanism available I've edited main.cf and added the following: smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/saslpass smtp_sasl_mechanism_filter = plain, login smtp_sasl_security_options = I've updated my password file "saslpass" to contain : [smtp.sbcglobal.yahoo.com] login:password and ran postmap hash:/etc/postfix/saslpass And I've run postfix reload... Oh, I also crossed my fingers that didn't seem to help either :-) Is SASL able to log into an smtp server like outlook does to send email? Or is there another solution I need to pursue? The good news is that inbound mail works great! Thank you for your help Sean