Setting up sender authentication for outbound mail
Outbound sender authentication helps mail servers that are outside of your organization to detect when they receive messages that have forged email addresses or header information that appear to come from your domains.
Sender authentication for outbound mail requires changes to your DNS records that are outside the scope of SMG operations. The outbound setups in the following table describe what you need to do to set up sender authentication for outbound messages.
Sender authentication method
Outbound implementation steps
(Enable receivers to detect spoofed emails from your domain)
Create a DNS record to provide proof of your domain ownership. Refer to resources on the internet if you need instructions.
For more information, including the DMARC resource record syntax, visit . You can also find a general procedure for implementing DMARC in the dmarc.org FAQ "FAQ#What_steps_should_I_follow_to_implement_DMARC_on_my_corporate_email_domain.3F"
Symantec Email Fraud Protection is a cloud service that helps customers implement the DMARC standard to prevent attackers from spoofing their domain names. Email Fraud Protection is offered as an add-on for Symantec Messaging Gateway. Customers who purchase the service point their DMARC, SPF, and DKIM records to the Email Fraud Protection platform, which responds to authentication requests in real time and ensures that email sent using the customer’s domain name is authorized. For information about how Email Fraud Protection works, see the service’s online help at FRAUD_PRO?locale=EN_US.