So we've been using Office 365 for the last 17 months. We email out daily reports from our IBM System i. To get that working I had to setup the SMTP relay following the instructions here:
How to Allow a Multi-function Device or Application to Send E-mail through Office 365 Using SMTP
Now, as of yesterday afternoon, it has quit working. Just plain quit. No changes have been made to any of the setup. I would know since I am a one-man IT shop, and I didn't make any changes.
I have been through all of the setup again, and everything appears to be just fine. I can email to others outside of our domain, including my personal Gmail account just fine.
Interestingly enough, I can NOT send to my Hotmail account.
Did Microsoft change something on their side? Some policy shift that doesn't allow SMTP relays anymore? Any suggestions on how I can get...