I had to send about 50 emails today, and I had them all in my Outbox ready to be sent out. When I sent them, for about 20 of the messages I got an error saying a submission rate limit was reached. It turns out the SMTP server I was using had a very low limit for emails sent per minute. My question is: Is there a way to find out which of the emails had the error and did not get delivered? I can just send them again, but I can't tell which emails got sent and which did not. All the emails have been removed from my Outbox and are now in my Sent folder, which is not helpful because some of them did NOT get sent properly. Sort of related... is there a way to add a pause to throttle how many emails get sent, so that I don't hit the limit again?