Thanks for your replies!!!
I now found out the reason is my Firewall - installed a complete new one - but the same problem. I have to stop my firewall to get my emails - its boaring, but I m not able to configure this firewall he now understands Avast is my email-master....
![Undecided :-\](https://forum.avast.com/Smileys/default/undecided.gif)
Is there a anyone who can help me PLEASE