Disabling Office 365 Anti-Spam Protection
Disabling the anti-spam protection on Office 365 ensures that email being delivered from The Packet Hub to Office 365 is not incorrectly identified as spam and helps prevent email from being delayed or failing from being delivered. To do this, The Packet Hub IP Ranges need to be added to an 'IP Allow List' in the 'Connection Filtering Policy'.
1.0 Click Admin centers and click Exchange.
1.1 Login to the Office 365 Exchange Admin Centre (EAC)1.2 Select 'Protection' from the menu on the left.
2.1 Click on 'connection filter' and the 'Edit' icon.
4.1 Add the 'The Packet Hub' Network Ranges which can be obtained from 'The Packet Hub Mail IP Ranges'.
4.2 Check the 'Enable Safe List'/
4.3 Click 'Save' to have the changes applied.