I understand this is something that a lot of people have been asking about, so I thought I'd share it. The problem can be solved with three simple changes:

1. Manually "chgrp -R Maildir-shared/.Folder/" to whatever group you want 2. Manually "chmod g+s Maildir-shared/.Folder/tmp/" so new messages will be owned by that group 3. Apply the attached patch file to qmail-local.c so new messages will automatically get the same group privileges as the "Maildir-shared/.Folder/tmp/" directory

The patch does not affect normal delivery in any way, the group permissions on a new message is only changed if the relevant "new" subdir group privileges have been changed. After you have applied the qmail patch, stop qmail, recompile with "make setup check" and restart it.

Sam, maybe the modified maildirmake utility could set the g+s flag automatically when creating shared folders? I can't really see that it would harm anyone.

Comments are more than welcome.