We have a number of clothing stores which use POP email provided by our server (exchange 2003). The are all on an adsl connection along with our server. They also use our server as the smtp server to send mail through. Some stores are connecting to the mail server and sending no problem, or i should say most are working fine. One store when trying to send and recieve (ie send an email in outlook express) cannot contact the server and fails to send the message.
What i need to know is a way to monitor if our server is actually getting the request to send the email or not. In outook express when the email is attempted to be sent, it just continues to say contacting smtp.myserver.com and then times out saying your server could not be contacted.
I have a thought that it is our isp as they port 25 filter all connections. We have apparently opted out of this and theoretically it should work. Ive tried the connection from another isp to the server and its fine. Taking this into account, all the other stores that work are on the same isp as the server and some work and some dont.