On 14.6.2013, at 10.11, Christoph Hintermüller christoph@out-world.com wrote:

Where can i find the list of prerequisites for compiling dovocot 2.2.2 form the sources, is there a dedicated link or what terms i should best use to search the archives of this mailing list, the documentation or the web?

Dovecot doesn't really require anything, but depending on what features you want to use you may need to install some libraries, like openssl. http://wiki2.dovecot.org/CompilingSource has some things if you want to compile from Mercurial.

Where do I find information (links or search terms) whether plugins available for 1.x 2.1.x series, especially the metadata plugin, are still needed for 2.2.2 or may even be harmful for 2.2.2 as built in. Documentation on Dovecot webpage is rather sparse and not really conclusive concerning metadata plugin within 2.x series. On my Ubuntu 12.X systems i still find it for 2.1.x but I have difficulties to understand whether there exist a version for 2.2.X series, if this is equal to the one for 2.1.X or whether it is not needed any more for 2.2.X series. Further what libraries would be required.

In general: If it compiles, it works. http://hg.dovecot.org/dovecot-metadata-plugin/ has v2.2 compatibility. At some point in v2.2.x development it will probably have native METADATA support.