I have a MAPI C++ plugin which connect to outlook.

Is there a way where I can confirm or verify if outlook is unable to send SubmitMessage() call to my transport provider? Because in normal scenario when someone composes new email and clicks send button I do receive call in SubmitMessage() function of my transport provider. But at time when outlook stucks/hangs, I don't receive any such call in my SubmitMessage().

I wanted a way to prove it that Outlook is not sending that message to transport provider.

Is there a tool where I can check that out? Tried ProcMon But it's not that much useful.

Tried API Monitor, but it didn't help