Q:

preg match email and name from to

i want to find name and email from following formats (also if you know any other format that been getting use in mail application for sending emails, please tell in comment :))
how can i know name and email for following format strings (its one string and can be in any following format):
 - jon435@hotmail.com
 - james jon435@hotmail.com
 - "James Jordan" <jon435@hotmail.com> (gmail format)
 - janne - jon44@hotmail.com (possible format)

A:

The answer is straightforward, at least for the email portion.  The rest can be special-cased away. 
(?:[ a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])

Proof I'm not insane.