(There's no video for Green Mail 1.0b13 yet. Please contribute to MR and add a video now!)
Green Mail is a fully 68K compatible email client. It's loaded with features, yet only weights 2MB and it has a very nice interface fully embellished with stylish color icons.
Green_Mail.sit (738.62 KiB / 756.35 KB)
Green Mail 1.0b13 / compressed w/ Stuffit
At least 7MB of free RAM
Mac OS 7.x - Mac OS 9.2.2
Appearance v1.0.3 is required for versions earlier than Mac OS 8.5
Emulating this? It should run fine under: SheepShaver