The DMARC initiative was formed to help fight spam and abuse by making it possible to verify if a message was actually sent from the address it appears to be sent from. DMARC stands for Domain-based Message Authentication, Reporting & Conformance. For more information, see DMARC.org 

Warning! The details below may be outdated due to recent changes by SendGrid. Please proceed with caution while we research this further.

How Do I Implement DMARC For Platform Mail?

A. Turn Off Automatic Security
  1. In your SendGrid account:
  2. Turn off Automatic Security in order to configure DKIM:

B. Capture the DKIM and SPF Values
  1. In your SendGrid account:
  2. You will get a page which gives you the actual DKIM and SPF records to add as TXT records to DNS.
  3. Copy these values for configuration in DNS.
C. Configure DKIM and SPF in Your DNS Records
  1. In your DNS records:
  2. Use the provided values to configure DKIM and SPF:

Note: The MX record is not necessary in our configuration!
D. Verify your DNS
  1. Back in SendGrid:
  2. Verify your DNS

It can take up to 48 hours for the records to verify after you make your changes in DNS, so you may have to come back later to verify.

  1. In your SendGrid account:
  2. View the Sender Authentication page
  3. Click Verify.
  4. If you have trouble, see Sender Authentication Troubleshooting 

Additional SendGrid Resources