Validate a comma separated email list

Question

I\'m trying to come up with a regular expression to validate a comma separated email list.

I would like to validate the complete list in the first place, then split

Answer 1

I am using the Regex from many years and code is same. I believe this works for every one:

^(\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]{2,4}\s*?,?\s*?)+$

Be happy :)