You are headed down some rabbit hole that doesn't even exist. You don't need any email service, account, or personal "details"... whatever that means. You don't even need the 3DR App to fly Solo, though the initial updates come through the App (and Internet) when connecting your device (phone) to the rest of the Solo system. The correct procedure must be followed to do this.
I can see that you haven't read the manual. Google "3DR Solo Manual", download it from the 3DR site and read it. If you still can't figure it out, come back with your questions.
Actually I have read the manual for the record, I have it saved on my phone as a PDF. I have been flying for awhile now and actually had a simple question. Way to go on assuming something that is inncorrect. That is the problem with society now a days, people like you are imbeciles and think you are always correct.
On a couple points you attempted to make.
1. Yes you should have your app connected because if you need to recalibrate your device your device you will need your app.
2. I don't think you should post the things you said because people that visit this site as guests may see your unintelligent reply and assume all of their setting are 100% ok and how they left them and are gucci.
3. Actually, for your information when I first got my drone right before I picked it up, I downloaded the app and signed in. It's LITERALLY the first option that appears when you goto the app and hit setting. Maybe YOU should know what the app has and doesn't have so you can better help others in the future. But as of right now, you are absolutely zero help whatsoever because you don't even use the app and don't know what options there are in the app.
So do everyone a favor and don't feel the need to comment with such trash in your response.
4. You said "details, whatever that means"
I'm sure 98% of people that actually use email know that "email details" means your login information, such as your password.
5. Just do yourself a favor and actually use the app so you can set your sensitivity speed all the way to "slow" so you don't actually hurt someone else. Thank you.