1. The portion of a packet, preceding the actual data, containing source and destination addresses, error checking and other fields. 2. The part of an electronic mail message or news article that precedes the body of a message and contains, among other things, the sender' s name and e-mail address and the date and time the message was sent.

In addition suitable contents:
[ 2 ] [ = ] [ ad ] [ address ] [ ag ] [ ai ] [ al ] [ am ] [ an ] [ ar ] [ arc ] [ as ] [ at ] [ b ] [ bo ] [ ch ] [ ck ] [ cl ] [ co ] [ con ] [ data ] [ date ] [ dd ] [ de ] [ ding ] [ du ] [ ec ] [ ed ] [ electron ] [ electronic mail ] [ e-mail ] [ e-mail address ] [ er ] [ error ] [ es ] [ et ] [ fi ] [ field ] [ file ] [ ge ] [ gs ] [ h ] [ hat ] [ hing ] [ hr ] [ id ] [ ie ] [ il ] [ in ] [ io ] [ ke ] [ ki ] [ ld ] [ Lex ] [ ma ] [ mail ] [ message ] [ mo ] [ mod ] [ module ] [ na ] [ ne ] [ news ] [ ng ] [ ni ] [ ns ] [ pa ] [ packet ] [ ph ] [ port ] [ pr ] [ query ] [ rc ] [ re ] [ ro ] [ sa ] [ se ] [ so ] [ source ] [ st ] [ T ] [ th ] [ tr ] [ tron ] [ ua ] [ ws ]