Installed this plugin since i was not getting e-mails while using PHPs mail() function. Set it to send through SMTP (Google Apps with auth).
Issue 1: IF using Google Apps SMTP servers: "From" e-mail field is ignored. The e-mails ALWAYS shows as if they came from my firstname.lastname@example.org account specified in SMTP settings.
Issue 2: IF other SMTP host is used (tested with COX) "Set the return-path to match the From Email" is ignored and always shows the info user enters in the "FROM" field in contact form.