Hello Kent,
Typically if Netsight is sending texts, then it's setup correctly. But you can make sure that Netsight server is sending out the texts. They are emails with formatting for text messages.
so assuming your running a netsight appliance, and the CLI is linux, a tcpdump will work.
sample:
tcpdump -i eth0 -s 0 tcp port 25 -w textmessage.pcapYou can then WinSCP of Filezilla client to the Netsight server to grab that file from the /root directory.
This trace should tell you if the email is able to get out to the specific vendor in question. If the Netsight Server is not sending we have a problem. If it does, the vendor likely has a problem.
If a windows server is being used, then I would install Wireshark and take and then filter afterwards for SMTP.