SEPM Scheduled reports - how to track?

Hello,

I'm looking for some details how to track outgoing emails from SEPM. Is there a specific log or table/view in a database where I can track this? Of course, there is Last Run Time in GUI but I wanted a little bit more.  Is it true that they fall into some queue if SEPM or SMTP is unavailable at the time where the report should be sent?

Best regards,

PG