It doesn't go to spam in my Gmail, which it did yesterday. However, some people are reporting the mail going to spam. This is why I'm asking, I can't test it myself on any account.
Another good test is http://isnotspam.com/. By sending an email from your app to check@isnotspam.com, you can get some good feedback on spam triggers.
I like http://www.mail-tester.com/ -- that creates a unique address just for you, while isnotspam lets you search for anyone else's message.