C# Email Regular Expression — Any out there that adhere to the RFC 2822 guidelines?

Question

I realize that there are a ton of regex email validations, but I can\'t seem to find one that adheres to the RFC 2822 standard.

The ones I find keep letting in junk

Answer 1

This runs in PCRE: http://code.iamcal.com/php/rfc822/full_regexp.txt

It's 32k, apparently.

Seriously - maybe consider backing off using a single regexp, or accepting ALL possible email forms.