Use The Inbox - HP iPAQ h1910 Reference Manual

4. Tap and hold a contact's name to see a pop-up menu.
5. Tap Delete Contact to remove the contact from the list.
6. Tap Yes to delete the contact permanently.

Use the Inbox

Send and receive e-mail by synchronizing your iPAQ Pocket PC
with your computer using Microsoft ActiveSync.
Use ActiveSync to send and receive e-mail. You can read and
compose e-mail offline using your iPAQ Pocket PC. The e-mail
remains in the Outbox until you synchronize with your personal
computer.
You see the name of the folder you are using at the bottom of the
screen.
Reference Guide
Communicating
3–7