Thanks Jason - that's the bit that was confusing me, ie if I used the gmail address to get round the SMTP issue, how would the recipient know the actual from address.
I've tried it anyway (although I haven't been able to confirm whether PEAR is supported yet.)
I've attached some screenshots of the Create Email Message, Mail Object Settings and From Settings as they currently are - can you have a quick look and let me know if that looks about right?
Its not working, so if it looks OK, I can put it down to PEAR not being supported, and abandon this route.
What happens is you fill the form in, and upon submit it starts to refresh the page, but fails before any emails are sent, page redirected etc, just loading up a blank white screen.