HP h5400 - Manual (Page 186)

7–12 Reference Guide
Communicating
5. Tap the file you want to attach. You may have to scroll to
view your document name.
6. See the file name you selected below the body of the e-mail.
✎
You can record a message and attach it to an e-mail.
✎
You do not receive e-mail attachments by default. You can select
this option in ActiveSync.