No, I am saying that OP is looking for an alternative client, which also doesn't upload their emails. For example, mailspring would be a bad recommendation because, as far as I know, it uploads your email to their server
There was a Linux client I saw a while ago—Spring Mail or something like that?—which first downloaded your email from your provider onto their own servers, then your local client got them from their server. This additional cloud step is what I want to avoid.