SPF (Sender Policy Framework)

SPF (Sender Policy Framework) is an email authentication method that allows domain owners to specify which mail servers are authorized to send email on behalf of their domain. It works through a DNS TXT record that lists approved sending IP addresses and servers. When a receiving mail server gets a message, it checks the sender's domain SPF record to verify the email came from an authorized source.

Without SPF records, anyone can forge emails that appear to come from your domain, which is a technique commonly used in phishing attacks. For publishers using custom domains with email features, a properly configured SPF record prevents your legitimate emails from being flagged as spam. It protects both your brand reputation and your audience's trust.

FlipLink handles email sending through its own verified infrastructure, so the platform's sending servers are already authenticated. If you use a custom domain for your FlipLink publications and want email notifications or lead capture alerts to reference that domain, your DNS records should be configured to include FlipLink's authorized sending servers. This ensures that emails related to your publications pass SPF checks and reach recipients' inboxes rather than their spam folders.

A consulting firm uses a custom domain for their FlipLink publications. They add FlipLink's mail servers to their domain's SPF record. When a lead capture notification is sent, the recipient's email provider checks the SPF record, confirms the server is authorized, and delivers the message to the inbox instead of quarantining it as suspicious.