I still don't understand, what could be the point of deleting an email? Privacy reasons? If you are hosted by some company, telling them you want to delete som

I still don't understand, what could be the point of deleting an email? Privacy reasons? If you are hosted by some company, telling them you want to delete something does not necessarily interact with their retention policy. If you self-host, this is not a problem. Storage space? Of course not, it is cheap. This is related to minimalism. I try to minimize my material possessions, but for data, I don't find this relevant. Making it easier to find later, for you or your heirs? In that case, sure, make a folder of "important" emails, have a way to exclude "useless" emails from search by default. But this does not imply that you should delete them for real. Sure, it's an important and interesting problem to be able to find back the emails that matter. It doesn't mean that it's wrong to keep the others just in case.