Pretty straight forward here, I'd like to use MailTrap for
devMode and then use an SMTP service (Mandrill or like) for production. I looked through the General Config Settings docs but didn't see anything that lent itself to being SMTP related. Is this possible?
Not an easy way to do this in Craft 2, but this is possible in the upcomgin Craft 3 (currently in beta) using
craft/config/app.php, which is multi-environment aware.
Shameless plug: We've written a plugin that automatically updates your email settings depending on your environment. It's not free, but it is cheap :-) Please check out the page on our website for more information.