I have used Mozilla Thunderbird for years. I have five or six accounts that feed into it. On my home computer it downloads all of them; on my work computer I use the IMAP version (doesn't download).

I used to use Pegasus Pmail, but though it had complex features, it never got easier to use.

I have Microsoft Office, so I have Outlook, but I don't use it on my home computer. I use it at work and it has a lot of strengths, but Outlook was a target for spam and harvesting mail for so long that I never adopted it for my personal mail.

SRS