Knowledgebase
How to configure outbound relaying on Office 365
Situation The following steps should be taken to route email outbound from Office 365 to Proofpoint Essentials. These steps will help you provision/setup outbound mail-flow
Solution
  1. Configure Outbound Relaying on Proofpoint Essentials
  2. Configure Outbound Relaying on Office 365


1) Configure Outbound Relaying on Proofpoint Essentials

Follow these steps to route email outbound from Office 365 to Proofpoint Essentials

  1. Log in to your Proofpoint Essentials Console
  2. Click on Features tab
  3. Enabled Outbound Relaying
  4. Click Save
  5. Click on the Domains tab
  6. Click on button Manage Hosted Services
  7. Click on the slider for Office 365
  8. Click Save
NOTE: When this is enabled Proofpoint will automatically manage the IP ranges for Office 365 published by Microsoft. Updates are performed daily

 
2) Configure Outbound Relaying on Office 365

  1. Log in to the Office 365 Admin Center
  2. Select the Admin centers > Exchange menu item. The Exchange Admin Center is displayed
  3. Select the Mail Flow > Connectors menu item
    1. Create a new Connector by clicking the + icon at the top
    2. Set the New Connector:
      To: Select 'Partner Organization' from drop down list
      From: Select Office 365 from the drop down list
    3. Click the Next button
  4. Complete the New Connector:
    Name: Enter a name for your connector
    Description: Enter a description (optional)
    Turn On: Select this option to enable connector
    1. Click the Next button
  5. Select the Only when email messages are sent to these domains option
    1. Click the plus icon + to add domains that should use this connector
    2. Enter a value of  *  (asterisk) and a second value of  *.com  this will route all outbound emails through Proofpoint Essentials
    3. Click the OK button
    4. Click the Next button
  6. Select the Route email through these smart hosts option
    1. Click the plus icon + to add your Proofpoint Essentials smart host
      NOTE: Depending on your Data Center you will have to enter a specific smart host this can be found at:
      http://support.proofpointessentials.com/index.php?/Knowledgebase/Article/View/75/0/proofpoint-essentials-data-center-information
    2. Click the Save button
    3. Click the Next button
  7. Select the following options:
    Always use Transport Layer Security (TLS) to Secure the Connection (recommended)
    Issued by a trusted certificate authority (CA)
    1. Click the Next button to verify your settings
    2. Click the Next button
  8. Add an email address of a recipient for a domain external to your organisation
    1. Click the Validate button
      NOTE: If you did not choose to turn the connector on in Step 4, validation will fail. If your validation results show that the connection was successful, but the email failed to send because The domain of the recipient is not configured as part of connector - this may be due to the connector being disable. Try enabling the connector and re-attempting the validation.
  9. Once Office 365 has been successfully validated, click the Save button
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