Besides Thunderbird, is there any good desktop mail client for Windows that doesn’t involve uploading mail to a cloud first?
Besides Thunderbird, is there any good desktop mail client for Windows that doesn’t involve uploading mail to a cloud first?
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
Can you show any evidence that suggests that either Firefox or Mailspring keeps copies of your emails?
No one said that Thunderbird keeps copies of your email. But there are apps that do that and the OP does not want one of them.