title: CDO check if email was received/valid
body: <p>I want to add users with bad/invalid emails to a table in my database. (why: professors add students that may have written their emails down wrong, and we want to contact the professors with a report asking them to verify)
  Is there something like a delivery receipt to see which were actually received: <a href="http://classicasp.aspfaq.com/email/can-i-get-cdo-messages-to-return-a-read-receipt.html" rel="nofollow">http://classicasp.aspfaq.com/email/can-i-get-cdo-messages-to-return-a-read-receipt.html</a></p>
  
  <p>and then add emails to my table if the response from mail server is anything other than received.</p>
  
  <p>I would like to receive this information right when the script is run, but if this is not possible - can you think of a way to do this scripting-wise? I could run it once a week. It seems like VRFY is disabled on a lot of mail servers so I was unsure whether this was a valid option: <a href="http://onlamp.com/pub/a/onlamp/excerpt/sendmailckbk_chap01/index1.html?page=2" rel="nofollow">http://onlamp.com/pub/a/onlamp/excerpt/sendmailckbk_chap01/index1.html?page=2</a></p>
  
  <p>My code sends emails out fine; I just need to add this functionality.</p>