There are two mailing lists devoted to DBMail.
There is a users mailing list, firstname.lastname@example.org, that is used for discussions and questions about the use and configuration of DBMail. You can subscribe to the users mailing list here. Offsite versions of the archive are available at:
The developers mailing list, email@example.com, is used for discussions and questions about the development, current and future. If you want to participate in the development of DBMail, or have a strong opinion about its development, you're more than welcome to join us. You can join dbmail-dev here. Offsite versions of the archive are available at: