Endevor Bridge for Git 2.6.3 was looping trying to do the sync on startup, multiple emails received for the same mapping if mainframe credentials were incorrect in Bridge for Git.
Bridge for Git - Refresh elements - FAILED
Operation: Refresh elements
Message: Your mainframe account might be suspended or your credentials have expired
Release : 18.1
Component : BRIDGE FOR GIT 2.6.3
Upgrade to Bridge for Git 2.7.1