Symantec Email requires special configuration actions outside of Authenticate. 

Please follow these steps to complete configuration for Symantec Email, and then return to your automation-guided task list in Authenticate.

1. Make sure you have added Symantec Email as an 'Approved Sender' in Authenticate for the domain you are configuring it for.

If Symantec Email has not been approved, please do so now by selecting it from the ‘Service Name’ dropdown in Authenticate.

2. Add the DKIM keys for Symantec Email If you need help finding the DKIM keys, visit this article to get started. 

Once you’ve completed these steps, you can begin sending authenticated email using Symantec Email  

Additional information on Symantec Email

Symantec Email Security.Cloud, also known as MessageLabs, is an email gateway that supports authentication via SPF and DKIM. The gateway can also validate inbound emails for DMARC but this is not enabled by default.

If you're using it as a gateway, it is necessary to have MessageLabs included in the SPF record after delegating to Valimail. This is due to a known issue in their infrastructure. 

When Delegating SPF for a domain using MessageLabs as the gateway, the SPF record should look like this:

v=spf1 include:%{i}._ip.%{h}._ehlo.%{d} ~all