I would recommend giving mu4e a try. It is pretty fast and you can also use mu too.

If you need help initially getting things setup: http://cachestocaches.com/2017/3/complete-guide-email-emacs-... https://emacs.stackexchange.com/questions/12927/reading-and-...

A good benefit to using these terminal based type apps is you are able to see more information up front so you are not so susceptible to web based phishing exploits as you can see all the links, can fully automate what your doing and integrate it into other custom apps your building.

If you are more of a vim user you could get used to using Mutt https://wiki.archlinux.org/index.php/Mutt#Mutt_and_Vim