This happened a couple of months ago but only 100s of mails, and I painstakingly removed them all. Since last night I've had about 2000 downloaded and the more I delete, the more I receive. It's almost unmanageable.

Any suggestions? Thanks

Emails from who or where are they from?

I have a friend who had the same thing yesterday, and he uses Tiscali/TalkTalk and Outlook.com. Maybe it's a problem at the sever end.

You may need to go on the server and delete all the emails. If you have a new device it is always best to do this or else it will just download all the emails that are stored on the server. I had this once and learnt a valuable lesson.