When someone creates a new profile in Tender the email preferences default to notifying the user of changes in the issues/discussions they have participated in (either by creating or commenting on).
Default email preferences found in the profile edit screen (ex. https://help.tenderapp.com/users/####/edit).
Occasionally users report being "spammed" by Tender's support system. If this happens, have them check their email preferences before submitting a bug report. If they have any public discussion category notifications set, the user will receive ALL posts regardless of their direct involvement in the discussion.
A single email is sent when a discussion is added to a queue. The discussion is not followed when this is the only choice selected.