This may sound like a silly question - I have a form on my site - used for lead generation - we ask all of the standard questions - the qualifier questions determine the 'heat' of the lead. About 1/3 of the time - I will get leads that are determined to be 'hot' but the contact information is crap - generally nonsense typed into the form. What is the best way for me to somehow validate that data? I especially want to be sure the e-mail address and phone numbers are valid - or at the very least - recognize that there are invalid entries and kick the data out. Any suggestions?