I have children so in order to keep them safe from some of the filth that is on the internet I turned to OpenDNS.
In my dashboard, under Web Content Filtering I selected the High filtering level.
That was probably a mistake as my Outlook stopped working properly afterwards. It would complain about the outlook.office365.com certificates when receiving my corporate emails.
I tried two things and they seemed to have worked for me. I’ll put them below in case they are helpful to someone else.
- Change the filtering level
I changed the filtering level to Moderate.
- Manage individual domains
Under Manage individual domains, I added 3 domains to never block. These were office365.com, outlook.com and also my corporate domain.
After I did those two things, Outlook stopped complaining about receiving my corporate emails.
Some resources that might help others having issues with OpenDNS.