ability to download mails locally like outlook for easily offline browsing.

Since we receive emails where people respond to quoted parts of our emails, we’d like to be able to reply to them the same way without copy and pasting because, after doing this, it messes up the formatting and looks too jumbled. And, if you overhighlight and hit the delete key, it archives the message (on the MacOS App).

Add calendar into Missive. For meetings, tasks, invites, etc.

Would be nice to be able to have Google Calendar as part of Missive so that I do not have to keep a separate window opened to view my calendar.

Gmail allows you to star one of the many messages in a conversation. Starring the whole conversation is less useful to me as I want to single out and highlight one specific part of the communication.

We get a lot of emails with multiple team members on CC. Then when one team member @mentions another team members on that email, it creates two copies of the email. It'd be great if Missive could automatically recommend merging emails with the same subject and recipients, like it recommends merging emails that were sent outside Missive to start and then responded to within Missive.

I've been a big Asana fan, but am likely moving to https://niftypm.com in the future. I'd love a similar integration as this was a big selling point for me getting onboard with Missive.

Handle .ics event invitations and responses with shortcut buttons (Accept, Refuse, etc).