RegularExpressionValidator for multiple emails

Question

I\'m validating a textbox for valid email with this:

Answer 1

try this expression:

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