Original Server to Securence: “All Domains”, “Do Not Require TLS”
Securence to Your Server: “All”, “Opportunistic TLS” , after verifying TLS delivery change to “Require TLS”
Precedence: “Place at the Beginning”
Select “Require TLS for connections from the email gateways listed above”
Be sure to test these settings. Incorrect settings can cause email delivery to stop. Messages delivered to Gmail using TLS will have a “x-securence-tls-suite-outgoing” header specifying the TLS Cipher used to deliver the message to GMail. If this is missing, the message was not delivered to GMail using TLS.
In Securence, never disable incoming spam, virus or phish filtering. This will cause spam messages to get sent to Gmail and can cause delivery issues for non-spam messages.
Configure Securence to deliver incoming mail to GMail
Enable Domain Settings -> Incoming Settings -> General -> SPF Compliance -> Apply SRS when delivering to your server
This will cause Securence to modify the mail from in a way that prevents messages from getting rejected by Gmail because of SPF issues.
Search for “Google Apps MX record values”
Google Apps Administrator Help -> Settings -> MX records -> Google Apps MX record values