Two days ago I clicked on a box that came up while I was in my email (I thought it was asking me if I wanted to use threads to combine my emails, as I often get that question.) As a result I got an enormous amount of emails (25,000+) ending up in my trash. Much of that is spam. How do I resolve this? At this point I can't delete any new emails, as the trash is too full. I am guessing that the spam emails went into my trash by mistake. It is too laborious to go and move all the spam into the spam folder, and I don't want to delete all my old emails going back to 2011, as I like to search them from time to time when necessary.

Many thanks for any help! Molly