Email authentication keeps failing

I have never used an email client and I most likely never will (mantainig a physical hard drive is not my thing). But I don’t see why I can’t ditch webmails for Rocket.Chat, to a large extent if not entirely. My goals with emails are: 1) to avoid repetions, and 2) that I myself only handle emails if strictly necessary, so only the ones that people working for or with me don’t know how to handle. We had been checking out many webmail providers before discovering Rocket.Chat, but none come even close to how smooth goals 1) and 2) can be achieved with Rocket.Chat. We have been testing many possible scenarios with my PA the last 2 hours. It seems to be working superbly and to exactly fulfill our needs. I am not exactly sure what kind of limitations you are referring to, but this way of processing emails is pretty much what I have been looking for for several months already. Do I miss some important aspects that I should be aware of?