We do not have SMTP service monitoring. Usually Node with SNMP is just created and credentials are correctly configured and then NetXMS is automatically detects if SNMP is no more responsing.
If we are talking about service - we do not have special service for SMTP. But you can use telnet. I tested this approach by creating next DCI on my management node with IP of SNMP device:
NetworkService.Status(telnet://10.5.5.11:22)
As for the service I've just created service object under the node with SNMP with telnet + 22 port options and it is working.
			If we are talking about service - we do not have special service for SMTP. But you can use telnet. I tested this approach by creating next DCI on my management node with IP of SNMP device:
NetworkService.Status(telnet://10.5.5.11:22)
As for the service I've just created service object under the node with SNMP with telnet + 22 port options and it is working.