How can I validate email addresses with CDO?

[ettienne]

I use CDO to send shipment notification emails to customers for orders that have shipped, the typical email you would receive if you order anything online. There is no problem with sending emails.
The issue I have is that sometimes the email addresses are wrong or invalid, and CDO does not provide information on invalid email addresses - unless I am missing something.
What we would like to do is validate the email addresses somehow and create an exception list.
At this stage I am trying to figure out what the next step would be, so any suggestions are welcome.

 

[strongm]

What are you thinking an 'invalid' email adress is? One that doesn't follow the relevant RFC? Or one that doesn't exist on the target server?

 

[ettienne]

After giving the issue some more thought I am more concerned about processing rejected emails than validating email addresses.