Question: I am trying to write my own email (imap) app for android plattforms.  

There for I search for a library to help me by getting imap-folders and help me by sending emails or getting emails from the server with methods anf classes.

* I looked in the source code of k9 -> its to complex for me.
* I looked in the source code of the official email-app of android -> its to complex for me, but iI had seen the package emailcommon, but without a documentation.
* I find the library javamail, but no documentation for using it with android.

What is the best library for writing an email-app for android?

Answer: 
Jakarta Commons Net library works fine: <http://nilvec.com/sending-email-without-user-interaction-in-android.html>

I used it and for me it's good enough.
I found someone library and I still read the code.

You can check [this one](https://github.com/kristijandraca/BackgroundMailLibrary).