So I'm making the switch from one email client to

One problem: I had all of the mail from my previous email account forwarded to the one to which I'm switching, meaning I have over 50,000 emails (literally) that I need to delete.

When I try to delete them in bulk (right click: empty folder), it suddenly disconnects.

On, it just gives me an error message when I try to do the same thing.

The errors include: "Sorry, there seems to be a problem with right now"

And: "There was a problem with the service (a temporary network connectivity issue that has nothing to do with your computer). Please try again."

Is there an easier way to just remove every email in my inbox without all of these issues?

Thanks in advance,