Per-group (binding) Metrics, 184.108.40.206.4.1.19552.1.3
These act as a supplement to the MTA-MIB defined group statistics, so that the stat watcher can record active/delayed queues.
G+1 is the MTAGroupIndexID (see RFC 2789 MTA MIB and “Determining the ID for an MTAGroupIndexID”). The metrics are as follows:
220.127.116.11.4.1.19518.104.22.168.G+1: counter, active queue size
22.214.171.124.4.1.195126.96.36.199.G+1: counter, delayed queue size
188.8.131.52.4.1.195184.108.40.206.G+1: counter, failed message count
220.127.116.11.4.1.19518.104.22.168.G+1: string, binding name (matches MTA MIB)