I am having difficulty getting a mobile device to send email via my SBS 2003 server. I have the port 143 forwarded from my router to the SBS server and the user has a valid account. He can connected and download folders and messages to the phone he is using. However, when he tries to send the device gets an error message:
The message(s) could not be sent. Check that you have network coverage and that your account information is correct. Then try sending again.
Firstly, the network coverage must be okay as he was able to download incoming messages only seconds before and the username and password must also be okay for the same reason.
Thanks in advance