Currently there are three mailing lists to aid the development of Mailfilter and to inform people about updates and new releases. Feel free to subscribe to any of them if you think this might be of interest for you.
Bug Reports, Feature Requests:
You can use our public bug report system to let us know about program errors, or file special feature requests.
Contact the Author:
Mailfilter was written and is maintained by Andreas Bauer. Comments, suggestions, donations or threats should be directed to him. Before you report any bugs, please read the FAQ.