I have kontact installed and running wonderfully on my desktop pc (kubuntu JJ kde4.3RC2).

I have now bought a new laptop and installed the samr os on my laptop. I configured my kontact there exactly as on the desktop.

Everything works fine except for sending mails.

When I send a mail I recieve this error message:
sending with "quicknet" not valid.

Quicknet is my internet provider and I use thier smtp for sending.
smtp.quicknet.ch

This happens when connected to my home network or on the road.

Does anyone have an idea what could be going on?