Used to use K9 but after 5.600 they destroyed the best feature which was the overview page because the developer didn't want it, despite mountains of complaints and promises of 'maybe'. Now looks just like the Gmail app and sucks.Old APKs for 5.600 still available.....https://github.com/thundernest/k-9/releases/download/5.600/k9-5.600.apkNow owned effectively by Thunderbird and will become Thunderbird mail eventually.FairEmail - pretty nice. Open source, but good to buy the dev a coffee!!https://email.faircode.eu/https://github.com/M66B/FairEmail/releases