SPF
To authorize Cisco RES / CRES service to send emails on your behalf you will have to include the following SPF mechanism to your SPF record.
include:res.cisco.com
Authorize Cisco Registered Envelope Service to send emails using your domain by authorizing them in your SPF record.
To authorize Cisco RES / CRES service to send emails on your behalf you will have to include the following SPF mechanism to your SPF record.
include:res.cisco.com