A trip to regexlib.com revealed this little gem : ^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$ (mind the line wrap). Here is the link to the above expression : http://regexlib.com/REDetails.aspx?regexp_id=26 Regards, Burhan Khalid _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp