Editing Email Authentication (section)

=== SPF ===
SPF (Sender Policy Framework) records are TXT records on your domain that authorize specific servers to send mail using your domain name. When you set up a sending domain, this process includes setting up a Mailserver Domain with ActiveCampaign where you point your domain to us via a CNAME record. This allows ActiveCampaign to serve the necessary SPF record for you. As long as you have set up the Mailserver Domain, SPF will be fully covered in ActiveCampaign.

This means you don't need to create an SPF record or modify an existing one to work with ActiveCampaign. However, there are some benefits of manually setting up ActiveCampaign SPF records for your From domain, even though this isn't required for SPF to pass. Learn more about SPF in our [https://www.activecampaign.com/blog/understanding-spf-and-how-it-impacts-email-deliverability Understanding SPF and How It Impacts Email Deliverability] guide.

You can only create one SPF record for your domain name. If you have an existing SPF record, you will need to modify your current record instead of creating a new SPF record. To learn more, check out this detailed SPF guide from our Postmark team.