Oh dear. The large, multi-line text entry box that pops up is asking for an email address to send the test email to, not some dummy text. Poor UI coupled with me not reading = bad time.
1 of 1 people found this helpful
Back in FM14 I found out that FM uses an older authentication technology that Google does´t like by default. In my email setting for the Google account I set up "less secure apps" and it worked after that.