From now on you can find a bugtracker for Settler 2.5 RTTR here: http://bugs.siedler25.org
This replaces the forum and is hopefully a great assistance for us. The bugs can be reported in english or german. Please don't forget to mention the versions-number and attach the replay and maybe the async-logs.
Of course you can still use firstname.lastname@example.org, but it's faster to report the bug directly to the bugtracker.
Wishes for later versions of the game can be reported to the bugtracker too. The forum can still be used for discussions.