Now I use mutt only directly on the server running exim. Painless support for multiple domains, completely arbitrary from addresses with no configuration necessary, no imap, no magic directories showing up for no reason, no weird certificates, just pure ssh... It's the way to do it.
Otherwise, I stick to generic clients (Google webmail and Android app).
Though I migrated from mutt to lumail[0] (which I wrote) as I find the ability to script operations in Lua very useful.
I'm interested and will check back later :)
what if you do understand the internet and stay away from centralized third party solutions and rather self-host your email because it is too sensitive to give away to giant corporations ?
I also don't remember being involuntarily offline in the last four years so I don't optimize for it any more. Plus, it's email. It will be there when I get to it. You can incur hours of downtime and other servers will just dutifully keep trying to deliver messages. It's a pretty laid back service.
For instance, I have greylisting configured on my primary SMTP server, but no greylisting on my secondary (because it's run by a friend, not me). Some servers will contact mine, offer a message, get told "try again", and just not bother, even though they could try the secondary and get through straight away. Other servers will give up after failing to deliver for 30 minutes.
That is the main reason I still use mutt. I like to be able to edit my from header when sending messages without having to pre-create virtual identities and then pick from a list. I asked for this functionality to be added to Evolution but apparently my use case wasn't common enough.