My own yunohost-based mail server, an ISP mail box, two university mailboxes (zimbra). I mainly like that it's FOSS and on F-Droid (no google services for me).

My own yunohost-based mail server, an ISP mail box, two university mailboxes (zimbra). I mainly like that it's FOSS and on F-Droid (no google services for me). I haven't used Gmail in years, but IIRC, no annoying smart replies or features I don't use like gdrive, photos, hangouts... denser UI, reliable notifications, unified inbox, good multi-account support, support for gpg. It generally gets out of the way. My mother asked me to reinstall it after she changed phones. I could use better support for nested IMAP folders, better search and syncing of said folders. Probably a better config workflows for non techies? Though that's pretty good already. I would really like it to be easier to customize the sender mail address, as I make extensive use of +aliases, and would have to create a new identity each time.