Correct usage of FROM in email creation

A fix for issue #765 
Yes, and after this patch that's still the case.

The Message From header determines the name that the receiver sees. The FROM command to the smtp server sets the Return-Path header which is only used for bounces.

This stackoverflow thread explains it quite good: http://stackoverflow.com/questions/1235534/what-is-the-behavior-difference-between-return-path-reply-to-and-from