If you do not need help for configuration but you are sure that you have found a bug in the Evolution software, or if you want to request a feature you can file a bug report in the GNOME bug tracking system. Note that this requires registration first. Please try to avoid filing duplicates and check the bug writing guidelines first.

Also note that GNOME distributions sometimes introduce their own changes in Evolution that are not included in GNOME Evolution. This is hard to recognize for users but if you are aware of it please file a bug report in the bug tracker of your GNOME distribution instead.