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I have seen many examples, with many 'no, you missed something' comments. What is the right way to match an e-mail address?
For Sanity sake, only fully-qualified domain names, no @localhost allowed. (or, both ways)
Subdomains must be allowed ([email protected])
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To get a valid email id we use a regular expression /^[a-zA-Z0-9.! #$%&'*+/=? ^_`{|}~-]+@[a-zA-Z0-9-]+(?:\. [a-zA-Z0-9-]+)*$/.
A global match finds all matches (compared to only the first).
\s(\b\w*\b\s){1,2}\w*\. This allows 1-5 digits for the house number, a space, a character followed by a period (for N. or S.), 1-2 words for the street name, finished with an abbreviation (like st. or rd.). to allow for a dash but not require one.
This regular expression complies with the grammar described in RFC 2822, it's very long, but the grammar described in the RFC is complex...
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