I'm running WP on a ubuntu cloud server and had been trying to install a postfix/dovecot server for over a week with no success (Actually crashed the server several times) I finally gave up and went to hosted email with another provider. I was looking on the web for how to setup sendmail as outgoing only for WordPress when I saw this plugin in a Google search. It really sounded too good to be true. Usually when I find a plugin, it does "almost" what i need, then I end up deleting it. Boy was I surprised! This plugin does what it says on the tin! It took me 5 minutes to get email working for outgoing system messages, and that includes making a dedicated email address on the hosted email system.
I Can't thank you enough for this program! It took me 5 minutes to solve a problem I was working on for over a week. This should be in WordPress core!