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  • 18 Jun 2024


Email deliverability is crucial for any business that relies on email marketing or communication. One of the key components to ensuring your emails reach your recipients’ inboxes is setting up SPF (Sender Policy Framework). SPF helps to prevent email spoofing and improves the trustworthiness of your domain. This comprehensive guide will walk you through the steps to configure SPF for email deliverability.

What is SPF?

SPF (Sender Policy Framework) is an email authentication method designed to detect forging sender addresses during the delivery of emails. By configuring SPF, you specify which mail servers are allowed to send emails on behalf of your domain. This helps reduce spam and phishing attacks, ensuring that your legitimate emails are delivered successfully.

Benefits of SPF

  1. Improved Email Deliverability: Emails from authenticated servers are more likely to be delivered to the inbox rather than the spam folder.
  2. Enhanced Security: Protects your domain from being spoofed by spammers, reducing the risk of phishing attacks.
  3. Reputation Management: Maintains the integrity and reputation of your domain, which is crucial for email marketing success.
  4. Compliance: Helps comply with email authentication standards and regulations.

Step-by-Step Guide to Configuring SPF

Step 1: Understand Your Email Sending Sources

Before setting up SPF, it’s important to identify all the servers and services that send emails on behalf of your domain. These might include:

  • Your web server
  • Email marketing services (e.g., Mailchimp, SendGrid)
  • CRM systems
  • Internal email servers
  • Third-party applications
Step 2: Create Your SPF Record

An SPF record is a type of DNS (Domain Name System) record that specifies which servers are permitted to send email on behalf of your domain. The SPF record is a TXT record in your domain’s DNS settings.

  1. Format the SPF Record: The basic format of an SPF record looks like this: v=spf1 include:example.com ~all
    • v=spf1 indicates the version of SPF being used.
    • include:example.com specifies a mail server that is allowed to send emails for your domain.
    • ~all is the directive that indicates how to handle emails that don’t match the SPF record. ~all means soft fail, -all means hard fail, +all means pass, and ?all means neutral.
  2. Include All Email Sources: Ensure that all your email sources are included in the SPF record. For example:makefileCopy codev=spf1 include:mailchimp.com include:sendgrid.net include:yourdomain.com ~all
Step 3: Publish Your SPF Record

Once you have created your SPF record, you need to publish it in your domain’s DNS settings.

  1. Access Your DNS Settings: Log in to your domain registrar or DNS hosting provider (e.g., GoDaddy, Cloudflare, Namecheap).
  2. Add a New TXT Record: Find the option to add a new DNS record and select TXT record.
  3. Enter the SPF Record:
    • Name: Enter “@” to apply the record to your root domain.
    • Type: Select TXT.
    • TTL: Set to 1 hour or leave it at the default value.
    • Value: Enter your SPF record (e.g., v=spf1 include:mailchimp.com include:sendgrid.net ~all).
  4. Save the Record: Save the changes to publish your SPF record.
Step 4: Verify Your SPF Record

After publishing your SPF record, it’s important to verify that it’s correctly configured.

  1. Use SPF Verification Tools: There are several online tools available to check your SPF record, such as MXToolbox, SPF Record Check, and DMARC Analyzer.
  2. Check for Errors: Ensure there are no syntax errors and that all intended mail servers are included.
  3. Test Email Deliverability: Send test emails to verify that your emails are being delivered correctly and not marked as spam.
Step 5: Monitor and Maintain Your SPF Record

SPF is not a set-it-and-forget-it solution. Regular monitoring and maintenance are required to ensure continued email deliverability.

  1. Monitor Email Deliverability: Keep an eye on your email deliverability rates and investigate any sudden drops.
  2. Update SPF Record as Needed: If you add new email sending sources or change services, update your SPF record accordingly.
  3. Review Reports: Use DMARC reports to review how your SPF implementation is performing and identify any issues.

Common SPF Configuration Mistakes to Avoid

  1. Too Many DNS Lookups: SPF records have a limit of 10 DNS lookups. Exceeding this limit can cause your SPF record to fail. Use tools like MXToolbox to check the number of DNS lookups.
  2. Incorrect Syntax: Ensure that your SPF record follows the correct syntax. A common mistake is missing spaces or incorrect usage of directives.
  3. Not Including All Email Sources: Failing to include all email sources can result in legitimate emails being marked as spam. Double-check that all your mail servers are included.
  4. Using -all Prematurely: The -all directive is a strict fail policy and should be used cautiously. Start with ~all (soft fail) and monitor the results before switching to -all.


Configuring SPF is a critical step in ensuring email deliverability and protecting your domain from spoofing and phishing attacks. By following the steps outlined in this guide, you can set up and maintain an effective SPF record for your domain. Regular monitoring and updates will help you stay compliant with email authentication standards and maintain a positive sender reputation.

For more detailed assistance, refer to your email service provider’s documentation or contact their support team. Implementing SPF, along with other email authentication methods like DKIM and DMARC, will significantly enhance your email security and deliverability.

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