I've been struggling with this for a long time, and I can't seem to find an answer. The thing is that I've enabled the mailserver, I can send mails with the mail() function, but they're being sent from _www@internetID, and both Yahoo! and Gmail are blocking messages sent from my IP address, to my annoyance. So the question would be, where do I find the sendmail.ini, or its equivalent in Mac OS X if it's named differently than it is in Windows, so that I can use my Gmail account when sending mails? Thanks in advance!