[hdgvhicv]

I used Pegasus Mail back when I was on windows. I then used elm and later pine for many years until moving to webmail entirely.

[bigfatkitten]

Pegasus is still around, and still receiving updates.

https://www.pmail.com/v49x.htm

[pkphilip]

Pegasus - wow, that brings back memories! Used it a lot.. and so also Eudora