Communication Messages - backend access?

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Is there some place in the backend of the system where I can see/confirm that communication messages are getting sent?  I have a message set up to go out when a LP has been assigned.  It was working just fine and then suddenly, the emails no longer are going out (or at least they are not being received).  I'm hoping it's just a glitch with the system sending them so I'd like to confirm that the messages are queued somewhere and will eventually go through.