how retrieve email all ids from a file [closed]

[nightlon1]

Hai.. kindly check my file content\[code\]From: Bablu Pal <[email protected]>To: Anirban Ghosh <[email protected]>; Arindam <[email protected]>; arpita <[email protected]>; Arpita Das <[email protected]>; Bijoy Mandal <[email protected]>; Goutam <[email protected]>; "[email protected]" <[email protected]>; "[email protected]" <[email protected]>; Kris <[email protected]>; "[email protected]" <[email protected]>; "[email protected]" <[email protected]>; Poonam <[email protected]>; Priyam Paul <[email protected]>; Sourav Sarkar <[email protected]>; Souvik <[email protected]>; "[email protected]" <[email protected]>; "[email protected]" <[email protected]>Sent: Mon, 30 August, 2010 8:40:18 PM Regards sangeeta ---------- Forwarded message ----------\[/code\]from this file content, I want to retrieve only the valid email ids. how I will write the regular expression in PHP