Late Apple founder Steve Jobs took a stab at creating an email system back in the 1980s. According to Nathaniel Borenstein, who developed the email part of Carnegie Mellon's Andrew Project, Jobs
tried to hire Borenstein and his team. When they didn't bite, Jobs formed his own group and thus was born NexTMail.
The various organizations working on the email projects resulted in an
open standard approach instead of a walled garden.