Mail Application on MacBook Pro virtually SPAMMING MYSELF

Question

I recently came across an issue with receiving duplicated messages in my inbox (Mail application). These messages where ones that I had already deleted recently. Anytime my email would refresh, I would receive roughly 50 emails. It would continue on and on.
After talking to a few people on Apple Care Phone Support (fantastic service might I add), I was able to get back to normal. It turned out that the "MessageUidsAlreadyDownloaded3" file was corrupted. I needed to drag this file onto my desktop as it then created a fresh version of that file. The file was found in USERS-->HOME ACCOUNT-->LIBRARY-->MAIL--->"MessageUidsAlreadyDownloaded3"
Before dragging the file onto desktop, I had to completely close my Mail Application. And then reopen it after the fresh file was completed. After that, I could then delete the file off of my desktop. Voila! It worked.
I was told that this was a rare issue and hardly ever happened. But perhaps this can become useful to anyone who is having this problem and then can avoid 37 minutes on the phone.

Answer 1

Welcome to the Apple community.
You don't say which operating system you are using, often it can help with diagnosis if you include your operating system in your profile.
Is this a new problem, have you had mail working before or are you trying to set it up for the first time.
It may also be worth noting, that a large number of people are experiencing problems with iCloud email at this time, there may well be a problem with the servers. You may wish to wait a while and see if the problem resolves itself, before starting to fiddle with settings at this time.