the message list displays a list of your incoming e-mail items, who sent them, and the date they were received. e-mail items you've read have a check next to them. high-priority e-mail items appear in bold.

to open an e-mail item:
■ tap an e-mail item to open it.

to close an e-mail item:
■ tap done to close the e-mail item.
displaying full header information
by default, mail displays abbreviated header information, which comprises only the from: and subj: fields. the full header provides complete information about the sender, receiver, and copied recipients, in addition to the subject and date the e-mail item was created. mail uses the header type you select for all your e-mail items.
to display full header information:
1. open an e-mail item.
2. tap the complete header icon.
to redisplay the abbreviated header, tap the abbreviated header icon.