I\'m making a really simple email validation script that basically just checks the following
The least possible greedy validation you an do is with this RegExp /^.+@.+\..+$/
It will only ensure that the address fits within the most basic requirements you mentioned: a character before the @ and something before and after the dot in the domain part. Validating more than that will probably be wrong (you always have the chance of blacklisting a valid email).
use it like this:
var is_valid_email = function(email) { return /^.+@.+\..+$/.test(email); }