= Progress call: 17:00 UTC =

	* Email server
		* https://salsa.debian.org/freedombox-team/freedombox/-/merge_requests/2064
		* Bug in locking code - permission denied
		* File-based lock for concurrency
		* Shared across processes, not just threads.
			* action script (generally not to be run by sysadmin)
			* plinth cherrypy server (action_util does not run action scripts concurrently (?))
				* It is not concurrent by default, see run_in_background=False parameter of plinth.actions.superuser_run.
			* we may have dbus-based primitives in the future (message queues?)
		* It is implemented with fcntl.lockf
		* Tor as example of alternative non-file based locking for long-running action.
		* cherrypy not using fork currently, assume multi-threading only, use mutex (thread based synchronization)
	* Email server aliases
		* Users can be renamed (edge case)
		* Data migration: a signal triggers migration action
		* Associate aliases with uid number instead?
		* Use file based storage, easier to back up and restore
			* Plain text > file-based database > database server
			* Journal files maintained by file-based database systems
				* Permissions problems - plinth and postfix
				* May need a common group to put plinth, postfix, dovecot users into
				* SQLite generally needs write permission to the folder containing the database file (because it does not like to keep journal files around)
				* LMDB does not need to a journal (uses copy-on-write)
		* Sogo
			* https://sogo.nu/
		* Sender non-delivery notification: needs DKIM verification
	* Package holding issue (James)
		* Issue: https://salsa.debian.org/freedombox-team/freedombox/-/issues/2090
		* Workaround: https://salsa.debian.org/freedombox-team/freedombox/-/merge_requests/2067
		* Add check for flag to daily dist upgrade check.