DebianGis Mailing Lists
There a couple of mailing list where the project lives. For historical reason they are based on the original pkg-grass project area on Alioth
pkg-grass-general -- for users and developers (Main Archive | Gmane Archive)
pkg-grass-devel -- for developers, bugs and commits (Main Archive | Gmane Archive)
Both them are send-if-subscribed-only kind of list, in order to minimize the spamming forwarded to subscribers. That can introduce a little delay in email delivery, of course for non-subscribed people. Just in case, don't send twice messages: the lists admin will accept them in as soon as possible (consider the GMT+1 time zone too).