Updating the SPF Record for your Domain(s)
Your organization should already have an SPF record for the domain(s) registered with Office 365. This record must be updated in the DNS zone for the relevant domain to include the following:
- Remove: "v=spf1 include:spf.protection.outlook.com –all"
- Replace with "v=spf1 include:_spf.p8mail.io -all"
Configuring Outbound Routing
Follow the below steps to configure outbound 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 relay.p8mail.io Connector - Select Your Mail Flow Scenario dialog as follows:
3.1 Make sure you select From: Office 365 and To: Partner Organization.
3.2 Name the connector relay.p8mail.io
4.1 Add * as a senders domain.
5.1 Route email through relay.p8mail.io
6.1 Select `Always use Transport Layer Security (TTL)` and `Issued by a trusted certificate authority (CA)`
6.2 Confirm settings and save.