Yes, there are two mail account`s installed.
Yes, sometimes there are hanging with the mail check (T-Com, POP3 account).
Chat accounts are Jabber and WhatsApp. Normally they running very well.

Another problem is to install "n9repomirror_0.7.1".
Failure is "Installation unsuccessfully".
I don know why. Do you have any idea ?

I`ve installed now at first the version 0.6. No problem.
After this the updatemanger pop up and has informed me a new version of n9repomirror is now available. I try it but the same story. Failure !

Nevertheless I can activate now the developer-mode, what I think in the first step (but the required packages are not fully installed).
Can be there are some dependences there are not fulfilled.