Description:

The note routing feature is used to automatically associate a thread
of notes into an Eventum issue. By setting up qmail (or even postfix)
to deliver emails sent to a specific address (usually
note-<number>@<domain>) to the above script, users are able to use
their email clients to reply to internal notes coming from Eventum,
and those replies will be automatically associated with the issue and
broadcasted to the notification list staff members.