Have to say I've found the combination of Spark for iOS and Fastmail as mail provider satisfying. I still don't enjoy using email but now it doesn't constantly annoy me like Outlook and Office 365 do.
Spark has a clean interface for cleaning the mailbox in the GTD way. That is, reply to important emails, snooze what can be done later and archive all the rest.
This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!