For inbound delivery of email to Office 365, the following steps need to be performed to ensure that email is correctly delivered from The Packet Hub to Office 365.
1. Determine the Office 365 Host Name.
The Office 365 hostname is required so that mail from The Packet Hub can be correctly delivered to Office 365.
In order to determine the hostname, follow these steps:
1.1 Login to the Office 365 Admin Center.
1.2 Select 'Setup' from the menu on the left and then 'Domain'
2.1 Select your domain that you wish to configure.
3.1 The domain settings will be displayed. Take note of the MX value.
2. 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.
3. Configuring Inbound Routing
1.1 Log in to the Office 365 Administration Console.
1.2 Select the Admin.
1.3 Click Admin centers and click Exchange.
2.1 Select the Mail Flow | Connectors menu item and create a new Connector.
Complete the P8Mail to 365 Connector - Select Your Mail Flow Scenario dialog as follows:
3.1 Make sure you select From: Partner Organisation and To: Office 365
3.2 Name the connector P8MAIL to 365.
4.1 Click Use the sender's domain.
5.1 Add * as a senders domain.
6.1 Add the TPH IP addresses.
7.1 Confirm settings and save.