Up to this point, I have been using POP3 for my email accounts, yes I know this is awful, and I need to switch everything to IMAP as well as copy all of my emails over. I started with my Gmail accounts and have noticed that the Inbox and Sent sync, but the trash does not. It's important that I am able to keep tens of thousands of emails from my Gmail account from the past few years in case I need to reference them. When I delete an email to my Gmail account, it goes to Trash in Apple Mail on my drive, but not in Gmail. How can I fix this? Any help is very much appreciated!