I just wanted to let you know that we added the branded email feature you asked for a little while ago to Mailroom. You can just go to the Email part of your settings and set the From: address you want Mailroom to use.
I hope your summer is going well!
PS. We actually use Gmail for your domain for Sproutit right now. Gmail works great for personal email. Of course, we forward any address we need to share as a team such as sales, support, and contact, to Mailroom. Many of our customers use Mailroom and Gmail together like this as well.