How to route Outbound Email from O365 to HES ( Hosted Email Security)

03/26/2020 106 13845

DESCRIPTION:

When working with an O365 account, how do I route my outbound mail from O365 to HES? 

RESOLUTION:

To configure mail routing from the O365 server to Hosted Email security server, Start off on the O365 side of the configuration and create a send connector to point all outbound mailflow from O365 to deliver straight to HES. 

• Login to the Office 365 admin center, and go to Admin centers > Exchange.

• In the left pane, click mail flow, and click connectors.

• Click the + symbol, and use the wizard to create a new connector.

• From the drop-down menu select From: Office 365 and To: Partner organization:

• Give a Name to identify the connector:

• Click Next.
• Select Only when email messages are sent to these domains
• click the + symbol, and enter an asterisk ( * ) in the add domain field:

• Click OK and click Next.

• Select Route email through these smart hosts, and click the + symbol.

• Add the below mentioned outbound hosted (respective to your location) in the smart host section,

  For North American customers please use: usprodoffice365ou.com.outbound.snwlhosted.com
  For European customers please use: euprodoffice365ou.com.outbound.snwlhostedeu.com

Our new connector example will use the North America domain:

•  Select: Always use Transport Layer Security (TLS) to secure the connection (recommended) > Issued by Trusted certificate authority (CA): 

• On the confirmation page, verify your settings and click Next.
• Office 365 will run a test to verify your settings:

• When the verification page displays, enter a test email address, and click Validate.
• Once the verification is complete, your mail flow settings are added.

Now,Configure SonicWall HES to permit HES to relay outbound email from your O365 account to external recipients.

• Login into the HES portal as Admin
• Go to System> Network>Server Configuration> OutboundTab
• Under Configure your domain> Settings section, provide your domain name in the box next to it to allow relaying from your domain.
• Also, under option: Only this ISP can connect and relay through this path and select Office 365 from the drop down
• Click Apply Changes to save the settings.

Sonicwall Hosted Email security is now ready to accept outbound traffic from your Outlook 365 server.

Once outbound  mail is flowing, it is a good idea to create an SPF record for your domain.  For steps on creating an SPF record, click here.