The older mailing list is being archived in favor of discussions here on Discourse.
If you have anything to say about Déjà Dup in general, please file it here under Applications and tag it as deja-dup. Though bugs and support requests are still best handled by filing an issue on Gitlab.
To follow posts, visit the deja-dup tag page, then click the alarm bell and choose a subscription level.
Déjà Dup is a simple backup program for GNOME.