Are you sure you can't even view your sent messages once banned? Not sure that's true, but they were the standard hey x i've replied to you here etc.
Yes, I am sure.

I will try sending an email anyways.
You don't understand the question, hilariousandco is saying that you can view the list of sent messages even if you are banned. He is not talking about sending a message to anyone on the forum. Obviously, you are unlikely to be able to do that.
I think he actually can't. As seen on his screenshot, the "Outbox" is being highlighted instead of "New Message", that's him clicking and accessing the outbox page, and meet the error message.
