I have several clients that use Office 365 for email and they are all reporting that emails from me (hosted on Zoho mail) are being sent to the "Junk Email" folder. I tested and confirmed this. 

I checked the headers and noted that under X-Forefront-Antispam-Report, it shows CIP:135.84.80.216 ... CAT:BULK

It looks like Office 365 is detecting email from that server as bulk and filtering it. Is there anyway this can be resolved or can I be moved to a different email server?