I tested it with a specific service, and it restarted the service just fine but failed to send me the email. I have verified using the test button that the email settings are correct and have received the test email.
Here are the logs:
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] Tracing started. OS version: unknown Standard Server (x64) Service Pack 1Machine name: ##########, Username: #############, Interactive: True, CPU count: 12, CLR version: 2.0.50727.5485, Assembly File version: 2.0.44.0
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] ------------------------------
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] Program start.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] new NetWrixLib.LicenseHelper done.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] List omitservice.txt Loaded.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] List includeservice.txt Loaded.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] bShowGUI=False
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] About.SetProductTypeAndStatus done.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] About.SetCheckLicenseInfo done.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] Failed servers list loaded.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] Failed sevices list loaded.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] <<<<< Start notifier.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] *****************************
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:11 PM] Start server: localhost 5:29:11 PM
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] For server localhost Found:3 failed services.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] End server: 5:29:12 PM
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Applying omitlist...
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] New stopped Service is found. Server: localhost Service: Software Protection
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Reading Registry: Key=LastTimeNotification
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Reading Registry: Key=NotificationPeriod
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Time of last notification: 3/16/2017 5:22:47 PM
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] New failed service or server=True
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Is time to retry=False
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Handling Failed Services.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Starting service Microsoft .NET Framework NGEN v4.0.30319_X86...
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Starting service Microsoft .NET Framework NGEN v4.0.30319_X64...
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:12 PM] Starting service Software Protection...
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:42 PM] Build report...
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:42 PM] Send mail.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:43 PM] Writing to registry: Key=LastTimeNotification
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:43 PM] Failed Servers List Saved. Count=0
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:43 PM] Failed Services List Saved. Count=2
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:43 PM] Data collection and reporting completed successfully.
NSM.exe Information: 0 : [TID: 1, Time: 3/16/2017 5:29:43 PM] End notifier. >>>>>