RE: [PHP] Email Address Testing

Aren't there PHP SMTP classes that allow you to verify the validity of an email address? > -----Original Message----- > >[snip] > >Question: Is it possible to know which one of my hundreds if not > >thousands of email addresses are invalid without ever going through my > >return to sender address unknown emails or the receiver of the email > >ever responding? > >[/snip] > > > >Do you mean using PHP? > > > > > if you do mean using php - you cannot do this *accurately* because an > email address may be valid in it's format and still be non existent or > temporarily unavailable.