I think that's true for non-ASCII non-EAI locale parts as well. It's so inconsistent its surprising when it works?
From: [email protected] [mailto:[email protected]] On Behalf Of Philippe Verdy Sent: Wednesday, October 30, 2013 6:30 PM To: Shawn Steele Cc: James Lin; Paweł Dyda; [email protected]; [email protected] Subject: Re: Best practice of using regex on identify none-ASCII email address 2013/10/31 Shawn Steele <[email protected]<mailto:[email protected]>> For EAI (the question being asked), the entire address, local part and domain, are encoded in UTF-8. No. the question being sked (by James Lin) did NOT include this restriction: > "does anyone has the best practice or guideline on how to validate none-ASCII > email address by using regular expression?" In his 2 replies, he did not added this restriction to EAI only (which is just a possible option on the Internet, not mandatory and frequently not followed in many domains).
