php mail() only works for certain emails

[drf1229]

I've had some problems with a mail() script. For some odd reason, it sends emails to one of my gmail emails yet doesn't to my other. Has anybody else faced this issue? My mail function returns true each time, yet the message doesn't reach the server. Is this a free hosting issue? I'd like to be able to interact with my viewers via email, but this won't work if I can't send to certain addresses. Any advice is greatly appreciated!

[Danielx386]

Yea, my phpbb board doesn't work (email)..... I don't know if that releated