email address regular expression

^[A-Za-z0-9!#$%&'\*\+\-\/\=\?\^_`\{\|\}\~][A-Za-z0-9!#$%&'\*\+\-\/\=\?\^_`\{\|\}\~\.]*@[0-9a-zA-Z\-]+(?:\.[0-9a-zA-Z\-]+)*$
complies to what wikipedia says on the subject