The following solutions, listed in preferred order, can be used to address your domain security.
Option 1: Register a new, non-restricted Top Level Domain (TLD) for Sender Authentication Package (SAP) domain page/cloud, click, view and image.
Advantages: The domain can be secured by Digicert.
Disadvantages: The process takes from 1-3 weeks to provision. Inbound activity of click tracking and redirect, email viewed as a web page, and images in content will no longer work for Emails already sent.
Steps:
Option 2: Use a non-restricted TLD already configured in another Marketing Cloud Business Unit (BU) for SAP domain page/cloud, click, view and image.
Advantages: The domain is secured and provisioned in Marketing Cloud.
Disadvantages: The Brand may not be recognized. Inbound activity of click tracking and redirect, email viewed as a web page, and images in content will no longer work for Emails already sent.
Steps:
Option 3:Use your existing domain and replace the DigiCert certificate with one issued by a different certificate authority (CA). This is known as 'BYOC' - Bring your own certificate.
Advantages: Account Branding does not change for Page, Click and View domain endpoints.
Disadvantages: The process takes from 3-4 weeks to provision.
Required: Marketing Cloud does not support BYOC for Images (Akamai hosted). Therefore, you will need to use the Salesforce (ExactTarget) domain for Images. We do not believe this is a disadvantage because image URLs are not surfaced to the recipient.
Steps:
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