This is what I use, there are a bunch of them... //Creating the extern function... [DllImport("wininet.dll")] private extern static bool InternetGetConnectedState(out int Description, int ReservedValue); //Creating a function that uses the API function... public static bool IsConnectedToInternet() { int Desc ; return InternetGetConnectedState(out Desc, 0); }

Blake, Just my two cents. I had this same problem where I work with a list of over 2 million. The final solution that I implemented was to send all of the emails with a unique identifier in the return address. Like so: member_number@yourdomain.com. Then when a bounce occurs, the email will come back to our server. I use exchange so I had to write an event sink to parse the email address that was coming in and get the member number from whence it bounced and then update that member's email valid in our database. Not sure if this will work for you depending on your setup. It was tricky but we have it running perfectly now and we now bounce only 2% of our very large lists. One thing we had to keep in my mind was that there are different types of bounces, hard, soft, etc... Most mail servers will send this information back to you in the "bounce" email header and it is up to you to handle it accordingly. For us, we allow 3 soft bounces or one hard. Like I said, it was a little tricky but we cut our bounces down DRAMATICALLY. If you are interested in the details and some sample code, just reply here and I will get it to you. Thanks, Troy G

Mazy, No problem. Just thought there may be something else I could do that would be easier on resources. Thanks for responding, Troy

Hello all, I would like to know what the best practice is for testing if a program has a valid internet connection. I have a function which tells me if the program is connected or not but I would hate to have to call this everytime I need to perform some operation. What I am looking for is something like in Messenger when you lose an internet connection it notifies you. Am I limited to a timer that constantly checks for the internet connection or is there some way my app can receive a message when a connection gets unplugged or something similar. Does this make any sense? Any help is greatly appreciated. :)Thanks, Troy G