How to Set Up One Time Codes in Klaviyo Shopify

Email deliverability stands as the cornerstone of successful marketing campaigns. Without proper authentication, your carefully crafted messages might never reach their intended destination, rendering your efforts futile. Sender Policy Framework (SPF) records represent one of the most critical components in the email authentication ecosystem, especially for Klaviyo users seeking to maximize their deliverability rates. This comprehensive guide explores everything you need to know about implementing SPF records with Klaviyo to ensure your emails consistently land in subscribers’ inboxes rather than spam folders.

What Are SPF Records and Why Do They Matter?

SPF records function as digital gatekeepers that verify the legitimacy of emails sent from your domain. These specialized DNS records list all servers authorized to send emails on behalf of your domain, creating a security framework that helps receiving mail servers determine whether incoming messages are genuine or potentially fraudulent.

Email spoofing continues to plague businesses worldwide, with cybercriminals frequently impersonating legitimate domains to conduct phishing attacks and spread malware. SPF records provide a crucial line of defense against these threats by allowing recipient servers to verify that emails originate from authorized sources. Major email providers like Gmail and Yahoo now enforce strict authentication requirements, making proper SPF implementation essential for maintaining good deliverability rates and protecting your brand reputation.

How SPF Authentication Works

SPF authentication operates through a relatively straightforward verification process that happens behind the scenes whenever you send an email. The receiving mail server checks your domain’s DNS records to find the SPF record that specifies which IP addresses or servers are permitted to send emails from your domain. This verification happens automatically and takes just milliseconds to complete.

The SPF record contains specific syntax that lists all authorized sending sources, including your email service providers like Klaviyo. When an email arrives claiming to be from your domain, the recipient’s server compares the sending server’s IP address against your published SPF record. If the sending server matches an authorized source in your SPF record, the email passes SPF authentication and proceeds to the next authentication check.

Email servers typically evaluate SPF records alongside other authentication protocols like DKIM and DMARC. Together, these three protocols form a comprehensive authentication framework that significantly improves email deliverability and security. Without proper SPF authentication, your emails may trigger spam filters or be rejected entirely, regardless of their content quality.

How Klaviyo Handles Email Authentication

Klaviyo offers two distinct approaches to email authentication, each with different implications for how you’ll set up your SPF records. Understanding these options helps you make informed decisions about your email infrastructure and authentication strategy.

Shared vs. Dedicated Sending Domains

Klaviyo provides flexibility in how you configure your sending domain, with options that accommodate different business needs and technical capabilities. The platform supports both shared and dedicated sending domain configurations, each with distinct advantages and setup requirements.

Shared sending domains utilize Klaviyo’s own domain infrastructure, meaning Klaviyo handles all authentication requirements on your behalf. This option proves ideal for businesses seeking a quick setup with minimal technical configuration. When using a shared domain, your emails will show as coming from your business name via Klaviyo’s domain, which appears in the sender address.

Dedicated sending domains (also called branded domains) allow you to send emails using your own domain name, creating a more professional and consistent brand experience. This approach requires adding specific DNS records to your domain configuration but offers superior deliverability and branding benefits. With a dedicated domain, recipients see emails coming directly from your domain rather than through Klaviyo’s infrastructure.

Authentication Requirements for Each Option

The authentication requirements vary significantly depending on which sending domain option you choose with Klaviyo. These differences affect how you’ll approach SPF record configuration and overall email authentication.

For shared sending domains, Klaviyo manages all authentication protocols automatically, including SPF, DKIM, and DMARC. This hands-off approach means you don’t need to modify your DNS records or worry about technical configuration details. Klaviyo maintains strong authentication practices for its shared domains, ensuring reasonable deliverability without requiring technical expertise from users.

With dedicated sending domains, you’ll need to add specific DNS records to authenticate your domain with Klaviyo’s sending infrastructure. During the dedicated domain setup process, Klaviyo provides the exact CNAME records you need to add to your DNS configuration. These records enable proper authentication while maintaining your brand identity in the sender address.

Preparing to Add SPF Records for Klaviyo

Before diving into technical configurations, proper preparation ensures a smooth implementation process without disrupting your existing email systems. Taking time to understand your current setup and planning your changes carefully minimizes potential issues.

Assessing Your Current DNS Configuration

A thorough assessment of your existing DNS records provides crucial context for implementing SPF with Klaviyo. This preliminary step helps identify potential conflicts and informs your implementation strategy.

Start by performing a DNS lookup for your domain using tools like MXToolbox, DNSChecker, or Google’s Admin Toolbox. Look specifically for any existing TXT records that begin with “v=spf1,” which indicates an SPF record already exists for your domain. Record the complete contents of any existing SPF records, as you’ll need to incorporate these into your updated configuration.

Check for other email authentication records like DKIM and DMARC, which may interact with your SPF implementation. Understanding your complete authentication profile helps ensure all components work together effectively. Additionally, note which email services currently send on behalf of your domain, such as Google Workspace, Microsoft 365, or other marketing platforms besides Klaviyo.

Gathering Required Information

Successful SPF implementation requires specific information about your email sending infrastructure. Collecting this information beforehand streamlines the configuration process and prevents errors.

For Klaviyo integration, you’ll need:

• Domain registrar or DNS host access credentials: You must have administrative access to modify your domain’s DNS records.
• Klaviyo’s SPF include mechanism: For dedicated domains, this is typically “include:send.klaviyo.com” but may vary based on your specific setup.
• List of all email sending services: Document every service authorized to send emails from your domain, including internal mail servers, CRM systems, and marketing platforms.
• Current SPF record syntax: If you already have an SPF record, note its exact format and included services.

Having this information readily available prevents implementation delays and ensures you don’t accidentally remove authorization for legitimate email services when updating your SPF record. Remember that SPF records have technical limitations, including a maximum of 10 DNS lookups per record, so planning your record structure in advance helps avoid exceeding these limits.

Step-by-Step Guide to Adding SPF Records

Adding SPF records for Klaviyo requires careful attention to detail and proper syntax. This systematic approach ensures your authentication setup works correctly without disrupting existing email services.

Accessing Your DNS Management Console

The first step involves accessing the platform where your domain’s DNS records are managed. This location varies depending on your domain registrar and hosting configuration.

Log into your domain registrar’s account (such as GoDaddy, Namecheap, or Google Domains) where you purchased your domain name. Navigate to the DNS management section, which might be labeled as “DNS Settings,” “Name Servers,” or “Zone Editor” depending on your provider. Some businesses use separate DNS hosting services like Cloudflare or Amazon Route 53, in which case you’ll need to access those platforms instead.

Once in the DNS management area, locate the section for adding or editing DNS records. Most interfaces display current records in a table format with options to add new records or modify existing ones. Familiarize yourself with the interface before making changes, as the exact layout and terminology vary between providers.

Creating or Modifying Your SPF Record

With access to your DNS management console, you can now implement the appropriate SPF configuration for your Klaviyo integration. The approach differs depending on whether you already have an SPF record.

For domains without an existing SPF record, create a new TXT record with these settings:

• Record Type: TXT
• Host/Name: @ (represents your root domain) or leave blank (depending on your provider)
• Value/Content: v=spf1 include:send.klaviyo.com ~all
• TTL: Default or 3600 seconds (1 hour)

If your domain already has an SPF record, you must modify the existing record rather than creating a new one. Locate the current SPF record (a TXT record starting with “v=spf1”) and edit its value to include Klaviyo’s sending servers. For example, if your current record is “v=spf1 include:_spf.google.com ~all”, change it to “v=spf1 include:_spf.google.com include:send.klaviyo.com ~all”.

After making changes, save your updated DNS configuration. DNS propagation typically takes between 15 minutes and 48 hours, depending on your DNS provider and caching settings. During this period, email authentication results may be inconsistent as the changes propagate across the internet.

Verifying Your SPF Implementation

After DNS propagation completes, verification ensures your SPF record functions correctly with Klaviyo. This critical step confirms that your authentication setup works as expected.

Use an SPF record checker tool like MXToolbox or DMARCLY to verify your record’s syntax and functionality. Enter your domain name in the tool, and it will retrieve and analyze your SPF record. The checker should confirm that your record includes Klaviyo’s sending servers and that the overall syntax is valid without errors.

Send a test email from Klaviyo to an address where you can examine the email headers (Gmail allows this by clicking “Show Original” in the message options). Look for “SPF=pass” in the authentication results section of the headers, indicating successful SPF authentication. If you see “SPF=fail” or “SPF=softfail,” review your implementation for errors or wait longer for DNS propagation to complete.

Common SPF Record Challenges and Solutions

Even with careful planning, SPF implementation sometimes encounters technical challenges. Understanding common issues and their solutions helps you troubleshoot effectively and maintain proper authentication.

Syntax Errors and Formatting Issues

SPF records require precise syntax, and even minor formatting errors can cause authentication failures. These technical details matter significantly for proper functionality.

The most common syntax errors include missing spaces between mechanisms, incorrect use of qualifiers (like +, -, ~, ?), and typographical errors in domain names or IP addresses. For example, writing “includе:send.klaviyo.com” with a non-standard “e” character or forgetting a colon will break your SPF record.

To fix syntax issues, carefully review your complete SPF record against the standard format: “v=spf1 [mechanisms] [qualifier]all”. Ensure each mechanism is properly separated by spaces and uses the correct format for its type (include:, ip4:, etc.). Use an SPF validation tool to check your record before implementing it, as these tools can identify specific syntax errors and suggest corrections.

Multiple SPF Records and Lookup Limitations

Technical constraints within the SPF protocol create specific limitations that can affect complex email infrastructures. Understanding these limitations helps you design an effective authentication strategy.

A domain should never have multiple SPF records, as this creates ambiguity for receiving mail servers. If you discover multiple records during your assessment, consolidate them into a single comprehensive record that includes all authorized sending sources. Remember that SPF has a limit of 10 DNS lookups per evaluation, and each “include:” mechanism counts as one lookup.

If you approach or exceed the lookup limit, consider flattening your SPF record by replacing nested includes with their direct IP addresses or mechanisms. Alternatively, implement SPF record macros or use a dedicated SPF service that optimizes lookup efficiency. For complex email infrastructures, consider organizing sending services by subdomain to distribute authentication across multiple DNS zones.

Enhancing Email Security Beyond SPF

While SPF provides essential protection, comprehensive email security requires additional authentication protocols. Implementing these complementary measures creates a robust defense against email-based threats.

Implementing DKIM Authentication

DomainKeys Identified Mail (DKIM) works alongside SPF to verify email authenticity through cryptographic signatures. This protocol adds another layer of security that prevents tampering during transmission.

DKIM authentication works by adding a digital signature to each email header, which receiving servers can verify using a public key published in your DNS records. Unlike SPF, which only verifies the sending server, DKIM ensures the message content remains unchanged during transit. This protection proves particularly valuable when emails pass through multiple servers before reaching their destination.

For Klaviyo users with dedicated sending domains, implementing DKIM requires adding specific CNAME records provided during the domain authentication process. These records point to Klaviyo’s DKIM keys, allowing the platform to sign emails on your behalf while maintaining your domain’s reputation. With both SPF and DKIM in place, your emails carry strong authentication signals that improve deliverability and protect against spoofing.

Setting Up DMARC Policies

Domain-based Message Authentication, Reporting, and Conformance (DMARC) builds upon SPF and DKIM to provide comprehensive email protection. This protocol gives domain owners precise control over how receiving servers handle authentication failures.

DMARC policies instruct receiving mail servers on what action to take when emails fail SPF or DKIM authentication. These policies range from monitoring only (p=none) to quarantining suspicious messages (p=quarantine) or rejecting them entirely (p=reject). Additionally, DMARC provides valuable reporting capabilities that help identify authentication issues and potential abuse of your domain.

To implement DMARC with Klaviyo, add a TXT record at _dmarc.yourdomain.com with a value like “v=DMARC1; p=none; rua=mailto:[email protected]”. Start with a monitoring policy (p=none) to collect data without affecting delivery, then gradually increase enforcement as you gain confidence in your authentication setup. DMARC reports provide insights into authentication failures and potential spoofing attempts, helping you refine your email security posture over time.

Best Practices for Email Authentication Management

Maintaining effective email authentication requires ongoing attention and strategic management. These best practices help ensure your authentication framework remains robust as your email infrastructure evolves.

Regular Monitoring and Maintenance

Email authentication isn’t a set-it-and-forget-it task—it requires consistent monitoring and periodic updates to maintain effectiveness. Establishing a regular maintenance routine helps prevent authentication failures and deliverability issues.

Follow these numbered best practices for ongoing authentication management:

1. Schedule quarterly reviews of all authentication records (SPF, DKIM, DMARC) to ensure they remain current and accurate.
2. Implement automated monitoring tools that alert you to authentication failures or policy violations.
3. Review DMARC reports monthly to identify potential spoofing attempts or configuration issues.
4. Update your SPF record promptly whenever you add or remove email sending services from your infrastructure.
5. Test authentication after making changes by sending verification emails and checking authentication results.

Regular maintenance prevents authentication drift, where your published records gradually become misaligned with your actual email infrastructure. This misalignment can lead to legitimate emails failing authentication checks, harming your deliverability and potentially disrupting business communications.

Gradual Implementation Strategy

Authentication implementation works best as a phased approach rather than an immediate switch to strict policies. This gradual strategy minimizes disruption while maximizing security benefits.

Start with baseline authentication by implementing SPF with a soft fail policy (~all) and DKIM signatures for all outgoing emails. This foundation establishes authentication without immediately rejecting messages that fail checks. Add DMARC in monitoring mode (p=none) to collect data about your email ecosystem without affecting delivery.

After collecting at least 30 days of DMARC reports, analyze authentication patterns and address any legitimate services failing authentication. Once confident in your configuration, increase enforcement gradually—first to p=quarantine with a low percentage, then to p=reject as your authentication framework proves reliable. This measured approach prevents accidental disruption of legitimate email while steadily improving your security posture.

Securing Your Email Future with Proper Authentication

Email authentication represents a critical investment in your digital communication infrastructure. Taking the time to implement proper SPF records with Klaviyo pays dividends through improved deliverability, enhanced security, and stronger brand protection.

The Growing Importance of Authentication

Email authentication requirements continue to evolve, with major providers implementing increasingly stringent policies. This changing landscape makes proper implementation more important than ever for marketing success.

Google and Yahoo now require proper authentication for bulk senders, with non-compliant emails facing delivery penalties or outright rejection. These requirements reflect the growing industry focus on email security and the ongoing battle against phishing and spoofing attacks. As authentication standards evolve, staying current with best practices becomes essential for maintaining effective email communication.

The benefits of proper authentication extend beyond technical compliance. Authenticated emails build recipient trust by confirming your identity and protecting your brand from impersonation. This trust translates to higher engagement rates, improved conversion metrics, and stronger customer relationships. By implementing comprehensive authentication with Klaviyo, you position your email program for long-term success in an increasingly security-conscious digital environment.

Taking Action on Email Authentication Today

Implementing proper SPF records with Klaviyo represents a significant step toward securing your email infrastructure and maximizing marketing effectiveness. The process requires attention to detail but delivers substantial benefits for your email program.

Begin by assessing your current authentication status and gathering the necessary information about your email sending infrastructure. Follow the step-by-step implementation guide to add or update your SPF record, ensuring proper integration with Klaviyo’s sending servers. Complement your SPF implementation with DKIM and DMARC for comprehensive protection, and establish regular monitoring practices to maintain authentication effectiveness.

Remember that email authentication represents an ongoing commitment rather than a one-time task. As your business grows and your email infrastructure evolves, regularly review and update your authentication records to ensure continued protection and deliverability. With proper authentication in place, your Klaviyo emails will consistently reach their intended destination, driving engagement and supporting your marketing goals.