OK, I now better understand how this works. A user will only receive one notification for each post (that is checked) he or she makes in a thread. That is not too bad. I was afraid users would be getting large amounts of e-mails from threads they were no longer involved in. Once I am sure I understand this fully I can send out a global announcement to inform users how to manage this feature.

Redcap, None of the moderators have full access to the software.