Email store/forward - duplicate emails

Hi, I have used store/forward service for a couple of years now. Recently, at random, I started getting duplicate emails, sometimes many, many times over. I see the same emails going through many times. Nothing in the email queue. Nothing in rejected emails. I think there is something wrong in your internal queueing mechanism. It's not repeatable, happens at random. Had been happening a lot today though, most I've ever seen. I got same emails 8 times already.