Right now, I am trying to get international email addresses to validate... right now this regex works like a charm for email addresses:
/^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*(\.[a-zA-Z]{2,4})$/
However, an international email address like this: amartiñez@yahoo.com will not pass validation. How can I change the above regex to make this pass?