I'm trying to keep an offline copy of my inbox using IMAP. I changed every setting I could find (like no cache limit, download the entire message instead of jus

I'm trying to keep an offline copy of my inbox using IMAP. I changed every setting I could find (like no cache limit, download the entire message instead of just the headers, ignore message age, don't delete any messages) and it still wants to download entire folders from time to time instead of just the changes. Maybe I did something wrong but that's my experience with IMAP support. It's also pretty slow but that might be some Gmail limitation.