Web Forms :: System.Net.Sockets.SocketException: A Connection Attempt Failed
Feb 14, 2011
I am using the codes sample from Peter through this link:http://www.eggheadcafe.com/articles/20030316.asp
to validate email address. I made some minor modification to validate user email address after the user have entered his or her email address as show below
string[] host = (address.Split('@'));
string hostname = host[1];
IPHostEntry IPhst =
Dns.Resolve(hostname);
IPEndPoint endPt =
new
IPEndPoint(IPhst.AddressList[0], 25);
Socket s =
new
Socket(endPt.AddressFamily,SocketType.Stream,
ProtocolType.Tcp);
s.Connect(endPt);
The last line of code s.Connect(endPt) generated the following error if the user email address is anything other than the company email address. I have try gmail, hotmail and they all generated the same error. Can the experts tell me how to get around the problem.
Here is the error:System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 64.4.20.174:25
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
at MGHRadiologyAlert.IfaWebService.ValidateEmailAddress(String address) in
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