[quailman]

Note that these regexes aren't even matching the same thing, so who knows what these things are matching. Whatever it is, it's probably not 99.99% of the world's emails, and either way nobody is going to check that. Especially nobody is going to parse that Perl beast.

As a tangential anecdote, I always thought it would be interesting to drop a backdoor into some canonical piece of code like this that noobs are bound to copy-paste. It might be the most efficient way to worm your way into the largest number of computers worldwide.

[dfhoughton]

There are two Perl regexes. The beast is for 5.8 (check your Perl version; it's probably above 5.12). The other is basically a BNF grammar and is trivial to parse. The only easier ones are those that throw up their hands and just look for an @ with characters before and after.