To authorize Pardot to send emails on your behalf and increase email deliverability of your campaigns you will have to configure SPF and DKIM records in your DNS.
SPF
The SPF mechanism used to authorize Pardot is shown below.
include:aspmx.pardot.com
DKIM
For instructions on how to generate DKIM keys for Pardot please click on the button below.
Create a free OnDMARC account to test your configuration.