Well this may help or may not help. First off, you'de have to replace any spaces in the subject and body fields with the corresponding character that server recognizes as spaces. Some servers use %20 and some (such as google uses +). Once you've figured that part out you can do something like so:
sockwrite -n <sockname> POST /mail/writeac...itesubject=some subject&writebody=some message
I could be wrong though. As an alternative, you could always use a free pop3 server and send the emails that way
(bluebottle.com offers free pop3 service)
