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How to Configure Outbound relay on Office 365

Product: ModusCloud



The following steps should be taken to route email outbound from Office 365 to modsuCloud. These steps will help you provision/setup outbound mail-flow.


Configure Outbound Relaying on modusCloud: 


  • Follow these steps to enable relaying on modusCloud.

          1- Log into the modusCloud website US or EU

          2- Click the Features tab.

          3- Enable Outbound Relaying and click Save.

          4- Click on the Domains tab.

          5- Click on the button Manage Hosted Services.

          6- Click on the slider of Office 365 and click Save.

NOTE: When this is enabled modusCloud will automatically manage the IP ranges for Office 365 published by Microsoft. Updates are performed daily.            

Configure Outbound Relaying on Office 365: 


  • Follow these steps to route outbound from Office 365 to modusCloud. 

          1- Log into the Office 365 Admin Center.

          2- Select the Admin Center > Exchange menu item. The Exchange Admin Center is displayed.

          3- Select the Mail Flow > Connectors menu item.

               - Create a new connector by clicking the + icon at the top and set a New Connector as follows.

                   From: Select Office 365 from the drop down list.

                   To: Select Partner Organization from the drop down list. 

           4- Click the Next button and complete the following below.

                   Name: Enter a name for your connector.

                   Description: Enter a description.

                   Turn On: Select this option to enable connector.

           5- Click the Next button. 

           6- Select the Only when email messages are sent to these domains option.

               - Click the plus icon + to add domains that should use this connector.

               - Enter a value of * (asterisk), this will route all outbound emails through moduscloud. 

               - Click the OK button and click the Next button. 

           7- Select the Route email through these smart hosts option. 

               - Click the plus icon + to add your modusCloud smart host.  

               - Click the Next button.

           8- Select the following options.

               - Always use Transport Layer Security (TLS) to secure the connection (recommended) Issued by a trusted certificate authority. 

               - Click the Next button twice to verify settings and continue. 

            9- Add and email address of a recipient for a domain external to your organisation and click Validate button. 

NOTE: If you did not choose to turn the connector on Step 4, validation will fail. if your validation results show that the connection was successful, but the email failedd to send because the domain of the recipient is not configured as part of connector - this may be due to connector being disable. Try enabling the connector and re-attempt the validation.

           10- Once Office 365 has been successfully validated click Save to complete the configuration. 

IMPORTANT: If outbound mail flow is flowing through modusCloud you will have to update your SPF record to reflect the record of modusCloud which is listed on our Getting Started with modusCloud kb which is v=spf1 ~all

Modified 2/15/2019
Keywords: Outbound relay Office 365
Article ID: 1997