This topic details the metrics for the SMTP service.

Availability - The agent reports an SMTP service available if it can connect to it and read the welcome banner.

Connection Metrics

All Inbound Connections - Number of inbound connections of all types to the service.

All Outbound Connections - Number of outbound connections of all types from the service.

Inbound Connections - Number of inbound TCP connections to the service.

Outbound Connections - Number of outbound TCP connections from the service.

Response Time - The time (in ms) it took to determine service availability.

TCP connection state metrics - The number of connections in each connection state is reported:

CLOSE_WAIT

CLOSED

ESTABLISHED

FIN_WAIT_1

FIN_WAIT_2

LAST_ACK

LISTEN

SYN_RECEIVED

SYN_SEND

TIME_WAIT