https://github.com/neomutt/neomutt https://github.com/neomutt/neomutt is a mature project with similar functionality in its arsenal via tagging and vim bindings

https://github.com/neomutt/neomutt https://github.com/neomutt/neomutt is a mature project with similar functionality in its arsenal via tagging and vim bindings, not limited to gmail either. You can also write emails in vim/$EDITOR fluidly.