[rt-users] no alert for invalid mail addresses

[Jeffrey Pilant]

Martin Wheldon writes:
> You might want to checkout the perl module Regex::Common::Email::Address

I looked at that
	http://search.cpan.org/~cwest/Regexp-Common-Email-Address-1.01/lib/Regexp/Common/Email/Address.pm
	Provides a regex to match email addresses as defined by RFC 2822. Under
	C<{-keep}>, the entire match is kept as C<$1>. If you want to parse that
	further then pass it to C<< Email::Address->parse() >>. Don't worry,
	it's fast.

This is from 2005, and the that RFC was replaced by 5322, which is what the big regex I gave was from.

The Wikipedia has even more relevant info on email addresses:
	https://en.wikipedia.org/wiki/Email_address
It talks about support for foreign character sets, quoted normally invalid characters, allowed comments, and do on.  Basically, it is nearly complete chaos.  Check out their "valid" and "invalid" examples, as well as the internationalization example.

/jeff
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