I use the resident Mozilla program called Thunderbird to manage most of my email accounts that will allow downloading (all gmail based.) Yahoo won't let me do that, and neither will Microsoft. I'd have to pay them an annual fee and I don't like their programs enough to bother.

Thunderbird can do POP3 (that's how I do it on my home computer) or IMAP (I have the program installed on my work computer, but it doesn't download everything into the computer, it just accesses the mail while I'm online.)

SRS