Mail queue issue (9.2)

I mistakenly put in more than one email address in the return address for an email notification. I realized what I had done and then corrected it yet Kiwi still is saying

Mail error: 501 5.4.4 Invalid address
Requeing 48 e-mail messages. Will try again in 1 minute.

I have cleared everything I could and cycled services and yet it still shows this error over and over.

Where is the stupid mail queue so I can either correct it or delete them?