I am trying to get e-mail from my plusnet account to work on my mobile. I have setup the account details for IMAP and STMP and the phone happily gets my e-mails. The problem I have is I cannot send any

. I am on the 3 network and have read their guides and the only thing I can think it may be is the out going mail uses port 25. Does anybody know how to fix this?
Regards
Rob