At work I am locked in to our corporate email client. For my personal email I use Eudora. It used to be owned by Qualcomm but I believe Mozilla now has it. I have stayed with this for years as it works for me and has survived all of my OS upgrades. (Going as far back as Windows for Workgroups.) It handles multiple email accounts, Junk Mail and filters just fine for me. I know I will have to give it up one day. The new version I tried and don't like it.
At work I am locked in to our corporate email client. For my personal email I use Eudora. It used to be owned by Qualcomm but I believe Mozilla now has it. I have stayed with this for years as it works for me and has survived all of my OS upgrades. (Going as far back as Windows for Workgroups.) It handles multiple email accounts, Junk Mail and filters just fine for me. I know I will have to give it up one day. The new version I tried and don't like it.