email issue on MDA Vario

[Beta-Glitch]

Hi, I hope you guys can help me.

I've had my MDA vario for about a week now, and ever since I got it, I cannot for the life in me get it to connect to my IMAP server using the built-in email client.

I done lots of testing stuff, which basically comes down to this:
networking/wifi is connected and working. I got an IP address from my DHCP server
I can ping the server's IP and receive information back
I can connect to the IMAP server using Qmail
but When I use the exact same connection details in the built in client, it doesn't work saying "unable to connect to the incoming mail server. Verify that your login information is correct, then try again to send and receive mail."

The other strange thing is, If I try connect to the mail server from outside my network, e.g. from my work's internet connection, entering my external IP, it works fine.

I've also checked out the server logs, and it doesn't seem to register a connection AT ALL.

so in short, the problem only occurs when connecting to my mail server from my local network, using the built in client.

Any ideas? is there a log file(s) I can check for any details of why it's not working?

I look forward to your replies.