Changes the From line on any email sent from the server.
I have issues with my hosting service not allowing me to easily set the 'From line' for my server email. When ever a new user signs up they see username@ even though they should see firstname.lastname@example.org. Before Send From you would be required to modify your installation of WordPress just about every time you do an update. No longer. With Send From, you simply go into your admin panel and set what the end user sees in their From line.