Winsock error Host not found

Greetings!

Our web site has several web email forms that make use of CDONTS that have been working just fine. Recently however, they have failed and I have error messages in both the Badmail and Queue folders with

Connection to company.com failed. No Ip address found from servername.company.com-IP address
email@company.com
Serer received Winsock error Host not found

What happened? The only two items I can think of are:
(1) I changed some permissions to deny specific user access. But I undid these changes with the same Winsock error.
(2) Our Exchange server went down and one of the components was reinstalled.

We use a DNS and have both an “A” and an “MX” record pointing to the proxy server.

What could have gone wrong and what can I do to fix it?

Any and All Help Appreciated!

Stan Yordy
Stan.Yordy@Rigby.com