When I decided to learn more about regular expressions back in 2002-2003 I found a regular expression for RFC822 (with comments removed): http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html
As an exercise, I deconstructed that into the pieces it was built from. Funny times :)
Don't see a timestamp on your link, but i suspect this one is more correct:
https://metacpan.org/source/RJBS/Email-Valid-1.202/lib/Email...
Re:SQL Keys in Depth
by nickjackson on Tuesday January 02, 2018 @05:45AM
(#16051134)
This is the only sane way.
Re:SQL Keys in Depth
by WorldMaker on Tuesday January 02, 2018 @03:54PM
(#16055523)
Until for some reason a user really needs to use a classic UUCP bang-path. Poor help!trapped!in!lost!server ;)
[1] http://referencesource.microsoft.com/#System.ComponentModel....