There could be a wide variety of issues for your email client not to connect to the mail server. First, if you arent able to reconnect within a minute or two, then try running a tracert to your domain name to see if your signal is getting through to the server. You can run a tracrt in Windows by going to START, then RUN, then type in COMMAND or CMD to enter a command prompt window. From the command prompt, type in:
This should show you a list of the servers your signal hops along on the internet to get to our server at the end. If any of the hops has a timeout, then that could possibly be one source of not connecting. I believe Outlook is set by default to give up trying to connect after 15 secs. If your tracert goes through to our server without any timeouts along the line or delays (pings greater than 150ms), then immediately try reconnecting with Outlook again. If there's still no connection, go ahead an reboot your machine. If you're using WindowsXP Firewall or Norton Anti-Virus, I wouldnt put it past those programs to block your email signal for no apparent reason out of the blue. Rebooting the pc could possibly put them back in their normal working order.
On occassion, we do have to restart mail services on a server for one reason or another, but this process usually takes less than a minute to be fully up and running again. So, its possible you may have tried to connect in the middle of a mail server restart, or larger server restart. So, give the server a minute or so to restart, then try connecting again.
If you STILL arent able to connect at that point, then you can either go ahead email us at email@example.com and we'd be happy to investigate from our end for you.