Email regular expression [duplicate]

Answer 1

^([0-9a-zA-Z]([-\.\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9})$

This is an awesome tool to help write and check expression, not sure if you have it but hopefully its helpful.

Expresso