phpbb/phpbb3 — pull request #719 by callumacrae (2012-04-06 17:11:24+00:00)
Title: [ticket/10162] Updated email regex to allow more emails.

The source of the original regex says that this regex is better. I've tested it and it seems to work.

http://fightingforalostcause.net/misc/2006/compare-email-regex.php

http://tracker.phpbb.com/browse/PHPBB3-10162