> HI All, > > How can I allow e-mails to be sent from my website to external users > (like GMail) but not be an open-relay to spammers? >
By default Postfix will deliver mail to it's intended destination (GMail, AOL, etc.). but will accept mail only from IP addresses in "mynetworks". I believe mynetworks (defined in main.cf) defaults to localhost, although it could be different on your distribution, so you should verify it's actual setting. http://www.postfix.org/postconf.5.html#mynetworks Allowing trusted outside users without becoming an open relay takes a little more work. The most reliable method I've tried is SASL Authentication: http://www.postfix.org/postconf.5.html#permit_sasl_authenticated Terry
