HP iPAQ h3800 Reference Manual page 84

Communicating
3. Tap Send to place the e-mail in the Outbox.
The e-mail is sent when you synchronize or it is sent
automatically if you are connected to the Internet or your
network through an e-mail service.
4. If you do not want to send your e-mail yet, tap OK to leave
your e-mail in the Drafts folder.
2–40 Reference Guide