This happens when a user is an admin and chooses to subscribe to 'all artifacts' on a project. As per [#281], admins get subscribed to tickets as they are created and need not subscribe to the tool itself.
The real issue is that users who are double-subscribed should only receive one notification. So modify the code that handles sending out notifications to deliver either to the mailbox for 'all artifacts' or to the mailbox for the individual artifact (preferably send only to the 'all artifacts' mailbox)
milestone: GA --> post-GA
custom_field__size: 1 --> 1
description has changed
description has changed
summary: Double-subscriptions for some users --> Double-subscriptions result in two e-mails
milestone: backlog --> GA8
assigned_to: Rick Copeland
milestone: backlog --> GA8
Superseded by [#954]
Related
Tickets:
#954