Getting notification emails with posts and messages that I've already seen

This happens to me all the time, and it drives me crazy.

If somebody sends me a message, I will get an email notification about it, even if I've already seen the message. It even happens if I've already replied to the message, and my reply will even be included in the email notification that Ryver sends to me. Ryver clearly has enough information here to know that I don't need a notification.

Here is an example from today. "W" is a teammate that sent me a message. I replied in under a minute, and two minutes after that I got a notification about it.

I'd like there to be a <5 minute (maybe user-customizeable?) delay on sending these emails, and to cancel it if I've already seen and/or replied to the post/message in question.