The newest version (0.3) of my Comment E-Mail Verification plugin now supports SMTP as an alternative method to send mail.
Thanks to Mark for testing and feedback
It is also the first version to come with a German translation.
If you would like to help by translating this plugin to another language please download the plugin, grab the .pot file, create .po and .mo files and e-mail them to me. (You will be credited.) If this was all gibberish to you you can still help: please start by reading Translating WordPress Plugins & Themes – Of course you may contact me at anytime to find out whether anyone else has announced or sent to me a translation to that language already. This will avoid any unnecessary efforts on your side.