Thanks for the suggestion! I was having issues with SendGrid and had never heard of Mailgun. Took literally 2 minutes to get set up on Mailgun, add the credentials to my app, and send my first email! It's a super small app so don't need anything fancy, Mailgun is perfect.

edit: Not to say Mailgun isn't fancy, I have no idea if it is or not, I can say that it works in minutes though.