mail through php not sending?

[makingwaves28]

Hello, I have phpBB set up on my account, but it doesn't appear to be sending out any activation emails via php. I've tried setting up smtp by creating an email address through cPanel and using mail.makingwaves.pcriot.com for the outgoing server and captainjeff+makingwaves.pcriot.com (I've also tried it with captainjeff@makingwaves.pcriot.com) with LOGIN authentication (the choices are PLAIN, LOGIN, CRAM-MD5, DIGEST-MD5 and POP-BEFORE-SMTP) but still nothing has come through. Any help in getting this set up would be GREATLY appreciated! Thank you!