FastMail is behind this protocol and from what I've read JMAP has evolved out of their web interface.

I've been a happy customer, even though lately I flirted with going back to GSuite for my personal email, but after a trial realized that Gmail does many things well, except for being a good email service. So I went back to FastMail and renewed for another 2 years.

Seeing this new protocol is exciting, because JMAP is being standardized at IETF. A breath of fresh air to see a new standard being developed.

Also from what I understand JMAP should be friendly for mobile usage. They kept notifications out of it, you're supposed to implement notifications using whatever the mobile platform provides. Interacting via JMAP is via plain HTTP requests, which is super cool.

I can totally see myself implementing a simple email client for automating online services. For example if you implement a commenting system for a website, you might want to do replies by email. That would be a cool project for me to try out.

I wonder if FastMail exposes JMAP publicly yet. Haven't seen any mentions in their admin or docs thus far.

> after a trial realized that Gmail does many things well, except for being a good email service.

This.

I remember back when Gmail was new and hot. It was unlike any other email service out there, and ridiculing people for using inferior email-solutions could to a certain extent be justified.

While other webmails were slow, had constantly reloading pages and what not, Gmail was fast. It was amazingly fast. Gone where the 5 minutes making the webmail work for you. You just sent the email and you were done. Just like that. Back then, this was unheard of.

These days though? Everyone is still pretending like GMail is the only game in town, when I think they have one of the worst webmail-interfaces out there. And it's slow. Oh god it is slow. And god forbid you try to load it in a browser not Chrome, because then it just grinds to a complete halt.

So yeah. Happy Firefox-using FastMail-customer here. You couldn't get me back to GMail even if you paid me.

Does FastMail let you have complex conditions in filters though? One huge value of Gmail for me is that I can have arbitrarily complex nested conditions to filter mail using a formula. I've been looking for even more flexible filtering (e.g. custom scripts) and yet I have not even come across anything on par with it.

fastmail lets you write complete scripts for filtering using the Sieve programming language. https://www.fastmail.com/help/technical/sieve.html

Holy cow, I will have to look into this. Thanks a ton!!

filters cannot be applied retroactively, however.

be sure to write your filters before receiving anything. Especially important if you're importing your email for the first time... and insanely annoying if you want to debug such an advanced filter.

as always with fastmail: It has great features... but always with a massive caveat.

It would be awesome if some day there was a "jmapfilter". I think JMAP would be really efficient for this use case.