There’s a ‘notify about queued posts after’ setting that may be useful?
That will send a notification out, and should send an email soon after (depending on your email preferences)
Update: I set this on my test site for 1 hour. I did indeed get a notification sent to my test moderator for the queued posts, but no email was sent out (both email settings were set to ‘Always’). I’ll have another look.
I did get an email for this one after I set the Notifications to ‘Watching’ as @osioke suggested. 
Edit: After a little rummage around, I also found this one for flags:
Update #2 I then set this one to ‘1’, and my test moderator got a private message after the hour saying there were items to review. This one did send an email.