= The ultimate email address regex =

 * http://www.thebuzzmedia.com/the-ultimate-email-regular-expression/
 * http://fightingforalostcause.net/misc/2006/compare-email-regex.php

God-fucking-yes: {{{
/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i
}}}

Just do it once, and get it right.

It's also a little more succinct than this one: http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html