I thought I would create a post as I had to dig around for this answer. Hope it helps you
Using modules.email.send() in business logic to send emails will almost certainly have your email rock up in the junk mail folder. After some digging I think I found that Kinvey uses SendGrind.
To send emails and prevent ending up in spam I did the following:
Please send me an email address that you used to send to hotmail and it went to the SPAM folder. Also, please include an email address that you sent to another email system that was NOT received in the SPAM folder. For privacy reasons, please send it to me via email at firstname.lastname@example.org
I'll take a look at our email service and see if I see anything unusual.
so far hotmail consistently sees all emails as junk, icloud and others seem to be ok.
I have tried the above suggestions with no luck. Huge issue...
Thank you very much for the feedback. It should be very helpful. We will review it and let you know if we have any questions.