# AutoSPF

> Automatic SPF flattening and email authentication management.
> Resolve SPF lookup limits, flatten SPF records, and maintain email deliverability across all your domains.
## Free Tools

- [SPF Record Checker](https://autospf.com/tools/spf-checker/)
- [DMARC Checker](https://autospf.com/tools/dmarc-checker/)
- [Domain Auth Checker](https://autospf.com/tools/domain-auth-checker/)
- [BIMI Checker](https://autospf.com/tools/bimi-checker/)
- [MTA-STS Checker](https://autospf.com/tools/mta-sts-checker/)
- [All Tools →](https://autospf.com/tools/)

## Pages

- [Home](https://autospf.com/)
- [How It Works](https://autospf.com/how-it-works/)
- [Enterprise](https://autospf.com/enterprise/)
- [SMBs](https://autospf.com/smb/)
- [Pricing](https://autospf.com/pricing/)

## Resources

- [Partners](https://autospf.com/partners/)
- [Compare](https://autospf.com/compare/)
- [Login](https://app.autospf.com/login)
- [DKIM Generator](https://autospf.com/tools/dkim-lookup/)
- [SPF Glossary](https://autospf.com/spf-glossary/)
- [How To Create an SPF Record](https://autospf.com/how-to-create-an-spf-record/)
- [Too Many DNS Lookups](https://autospf.com/spf-too-many-dns-lookups/)
- [Fix SPF Errors](https://autospf.com/fix-spf-permerror-and-temperror-a-diy-guide/)
- [SPF Record Format](https://autospf.com/spf-record-format/)
- [Macros vs Flattening](https://autospf.com/spf-macros-vs-flattening/)
- [SPF Flattening Myths](https://autospf.com/spf-flattening-myths/)
- [FAQ](https://autospf.com/faq/)
- [About Us](https://autospf.com/about-us/)
- [Contact Us](https://autospf.com/contact-us/)
- [Get Support](https://support.autospf.com/)
- [Book a Demo](https://autospf.com/book-a-demo/)
- [AI Info](https://autospf.com/llm-info/)
- [Trust Center](https://trust.duocircle.com/)

## Blog

### Foundational

- [How To Set Up SPF For Justhost.com](https://autospf.com/blog/how-to-set-up-spf-for-justhost-com/): Learn how to set up SPF for JustHost.com to authorize email senders, improve email deliverability, and protect your domain from spoofing.
- [How To Set Up An IONOS SPF Record](https://autospf.com/blog/how-to-set-up-an-ionos-spf-record/): Learn how to set up an IONOS SPF record to authenticate your emails, prevent spoofing, and improve email deliverability with this step-by-step guide.
- [Complete Guide To Setting Up SPF For Ontramail](https://autospf.com/blog/complete-guide-to-setting-up-spf-for-ontramail/): Learn how to set up SPF for Ontramail step by step to improve email authentication, boost deliverability, and protect your domain from spoofing.
- [Fix SPF Authentication Issues By Understanding These Syntax Rules](https://autospf.com/blog/fix-spf-authentication-issues-by-understanding-these-syntax-rules/): Learn the essential SPF syntax rules to identify and fix authentication errors, improve email deliverability, and protect your domain from spoofing.
- [How To Set Up SPF For Infusionmail?](https://autospf.com/blog/how-to-set-up-spf-for-infusionmail/): Learn how to set up SPF for InfusionMail to authenticate emails, improve deliverability, prevent spoofing, and reduce the risk of emails landing in spam.
- [Klaviyo SPF Record Setup: Complete DMARC And DKIM Configuration Guide](https://autospf.com/blog/klaviyo-spf-record-setup-complete-dmarc-and-dkim-configuration-guide/): Learn how to set up Klaviyo SPF records, DKIM, and DMARC correctly to improve email authentication, boost deliverability, and prevent spoofing.
- [How to Configure SPF for Stackmail](https://autospf.com/blog/how-to-configure-spf-for-stackmail/): Learn how to configure SPF for Stackmail to improve email authentication, reduce spoofing risks, and enhance email deliverability.
- [SPF SoftFail vs HardFail vs Neutral: A Complete Guide For Beginners](https://autospf.com/blog/spf-softfail-vs-hardfail-vs-neutral-guide-for-email-authentication-beginners/): AutoSPF, Automatic SPF flattening SPF SoftFail vs HardFail vs Neutral: A complete guide for beginners Play Episode Pause Episode Mute/Unmute Episode Rewind 10.
- [SPF Errors and Troubleshooting Guide: Fix Every SPF Failure](https://autospf.com/blog/spf-errors-troubleshooting-guide/): A complete guide to diagnosing and fixing every type of SPF error - PermError, TempError, 550 rejections, alignment failures, broken records, and syntax...
- [SPF Record Setup Guide: How to Configure SPF on Every Major Platform](https://autospf.com/blog/spf-record-setup-guide-every-platform/): A comprehensive hub guide to setting up SPF records across 60+ hosting providers, email platforms, and DNS services.

### Intermediate

- [How to Set Up DKIM for Engaging Networks](https://autospf.com/blog/how-to-set-up-dkim-for-engaging-networks/): Learn how to set up DKIM for Engaging Networks to improve email authentication, boost deliverability, and protect your domain from email spoofing.
- [How Can I Verify If Excessive DNS Lookups Are Causing My SPF Record To Fail Validation?](https://autospf.com/blog/how-verify-excessive-dns-lookups-causing-spf-record-validation-failure/): Learn how to verify whether excessive DNS lookups are causing your SPF record to fail validation and discover effective ways to fix SPF lookup limit issues.
- [How to Set Up SPF for Zoho Mail: A Complete Guide to Better Email Authentication](https://autospf.com/blog/how-to-set-up-spf-for-zoho-mail-complete-authentication/): Learn how to set up SPF for Zoho Mail to improve email authentication, prevent spoofing, and boost email deliverability with this complete guide.
- [How Can You Verify SPF Changes Before DNS Propagation Completes?](https://autospf.com/blog/how-can-you-verify-spf-changes-before-dns-propagation-completes/): Verify SPF changes before DNS propagation completes by querying authoritative DNS servers, checking records, and validating configurations accurately.
- [What Is SPF Redirect? A Complete Explanation](https://autospf.com/blog/what-is-spf-redirect-a-complete-explanation/): Learn what SPF Redirect is, how it works, when to use it, and how it simplifies SPF record management while improving email authentication.
- [How Can I Prioritize SPF Record Issues Found In An Audit To Quickly Reduce Email Delivery Risk?](https://autospf.com/blog/how-prioritize-spf-record-issues-audit-reduce-email-delivery-risk/): Learn how to identify and fix the most critical SPF record issues first to quickly reduce email delivery failures, spoofing risks, and authentication problems.
- [Shopify DMARC Setup: How to Meet Google and Yahoo Email Sender Requirements](https://autospf.com/blog/shopify-dmarc-setup-meet-google-yahoo-email-sender-requirements/): Set up DMARC for Shopify to meet Google and Yahoo email sender requirements, improve deliverability, and protect your domain from spoofing.
- [Why Does My Email Still Fail Authentication Even After Passing A Kitterman SPF Check?](https://autospf.com/blog/why-email-authentication-fails-after-passing-kitterman-spf-check-validation/): Passing a Kitterman SPF check alone isn’t enough. DKIM, DMARC, SPF alignment issues, forwarding, or DNS misconfigurations can still cause failures.
- [Mailgun DMARC Setup Guide: Configuring SPF, DKIM, And DMARC Correctly](https://autospf.com/blog/mailgun-dmarc-setup-guide-configuring-spf-dkim-and-dmarc-correctly/): Learn how to configure Mailgun SPF, DKIM, and DMARC correctly to improve email authentication, deliverability, and domain security.
- [What Is SPF Drift And Why Does It Cause Authentication Failures?](https://autospf.com/blog/what-is-spf-drift-and-why-it-causes-authentication-failures/): Learn what SPF drift is, how it happens when DNS records change, and why it leads to email authentication failures and delivery issues.

### Advanced

- [WHOIS Verification and ICANN Requirements: Why Accurate Domain Ownership Matters for SPF, DKIM, and DMARC](https://autospf.com/blog/whois-verification-icann-domain-ownership-spf-dkim-dmarc-email-security/): Keep your WHOIS details accurate to meet ICANN rules and protect email authentication. Reliable domain ownership supports SPF, DKIM, and DMARC security.
- [How to Configure DKIM for IONOS](https://autospf.com/blog/how-to-configure-dkim-for-ionos/): Learn how to configure DKIM for IONOS to improve email authentication, boost deliverability, and protect your domain from email spoofing.
- [How to Resolve the SPF Softfail “Domain Does Not Designate IP as Permitted Sender” Error](https://autospf.com/blog/resolve-spf-softfail-domain-does-not-designate-ip-permitted-sender/): Learn how to fix the SPF Softfail “Domain Does Not Designate IP as Permitted Sender” error to improve email security and deliverability.
- [When should I consider using SPF flattening or include mechanisms if multiple SPF records exist?](https://autospf.com/blog/when-consider-spf-flattening-include-mechanisms-multiple-spf-records-exist/): Learn when to use SPF flattening or include mechanisms to fix multiple SPF records and improve email authentication and deliverability.
- [When should I consider using SPF flattening or include mechanisms if multiple SPF records exist?](https://autospf.com/blog/when-should-i-consider-using-spf-flattening-or-include-mechanisms-if-multiple-spf-records-exist/): Learn when to use SPF flattening or include mechanisms to fix multiple SPF records and improve email authentication and deliverability.
- [DMARC, BIMI, and MTA-STS: The Full Email Authentication Stack A Six-Layer Guide for IT Directors Building a Multi-Year Email Security Roadmap](https://autospf.com/blog/dmarc-bimi-mta-sts-email-authentication-security-roadmap-it-directors/): - Layer 1, SPF: IP-based sender authorization. 56.5% of 12M domains publish SPF, but 2.9% are broken and 34.7% authorize 100K+ IPs.
- [Email Authentication and Cyber Insurance: How Underwriters Are Pricing DMARC in 2026 Why Your Authentication Posture Is Now a Line Item on Your Insurance Application](https://autospf.com/blog/email-authentication-cyber-insurance-dmarc-pricing-underwriters-2026-insurance-applications/): How underwriters are pricing DMARC in 2026. Cyber insurance is a $15 billion market with a $0.9 trillion protection gap, and email authentication is now a line...
- [Advanced SPF Validation Tips To Eliminate Permerror And Lookup Issues](https://autospf.com/blog/advanced-spf-validation-tips-to-eliminate-permerror-and-lookup-issues/): To eliminate SPF permerror and lookup issues, automatically validate SPF syntax.
- [AI-Powered Phishing in 2026: How Generative AI Changed the Attacker Economics of Email Why Email Authentication Is the Last Reliable Defense Signal in the Age of AI](https://autospf.com/blog/ai-powered-phishing-2026-email-authentication-last-ai-defense-signal/): - 80%+ of social engineering is now AI-supported, up from negligible levels three years ago.
- [Best Email Authentication Tools For Enterprise in 2026 The Complete Guide](https://autospf.com/blog/best-email-authentication-tools-enterprise-2026-complete-guide-solutions/): Email authentication is the process of verifying that an email message was actually sent by the domain it claims to come from.

### Recent Articles (50 most recent of 531 total)

- [How to Set Up DKIM for Engaging Networks](https://autospf.com/blog/how-to-set-up-dkim-for-engaging-networks/)
- [How To Set Up SPF For Justhost.com](https://autospf.com/blog/how-to-set-up-spf-for-justhost-com/)
- [How Can I Verify If Excessive DNS Lookups Are Causing My SPF Record To Fail Validation?](https://autospf.com/blog/how-verify-excessive-dns-lookups-causing-spf-record-validation-failure/)
- [How To Set Up An IONOS SPF Record](https://autospf.com/blog/how-to-set-up-an-ionos-spf-record/)
- [How to Set Up SPF for Zoho Mail: A Complete Guide to Better Email Authentication](https://autospf.com/blog/how-to-set-up-spf-for-zoho-mail-complete-authentication/)
- [How Can You Verify SPF Changes Before DNS Propagation Completes?](https://autospf.com/blog/how-can-you-verify-spf-changes-before-dns-propagation-completes/)
- [What Is SPF Redirect? A Complete Explanation](https://autospf.com/blog/what-is-spf-redirect-a-complete-explanation/)
- [How Can I Prioritize SPF Record Issues Found In An Audit To Quickly Reduce Email Delivery Risk?](https://autospf.com/blog/how-prioritize-spf-record-issues-audit-reduce-email-delivery-risk/)
- [Complete Guide To Setting Up SPF For Ontramail](https://autospf.com/blog/complete-guide-to-setting-up-spf-for-ontramail/)
- [Shopify DMARC Setup: How to Meet Google and Yahoo Email Sender Requirements](https://autospf.com/blog/shopify-dmarc-setup-meet-google-yahoo-email-sender-requirements/)
- [Why Does My Email Still Fail Authentication Even After Passing A Kitterman SPF Check?](https://autospf.com/blog/why-email-authentication-fails-after-passing-kitterman-spf-check-validation/)
- [Mailgun DMARC Setup Guide: Configuring SPF, DKIM, And DMARC Correctly](https://autospf.com/blog/mailgun-dmarc-setup-guide-configuring-spf-dkim-and-dmarc-correctly/)
- [WHOIS Verification and ICANN Requirements: Why Accurate Domain Ownership Matters for SPF, DKIM, and DMARC](https://autospf.com/blog/whois-verification-icann-domain-ownership-spf-dkim-dmarc-email-security/)
- [What Is SPF Drift And Why Does It Cause Authentication Failures?](https://autospf.com/blog/what-is-spf-drift-and-why-it-causes-authentication-failures/)
- [How To Add HubSpot DMARC, SPF, and DKIM Records Correctly?](https://autospf.com/blog/how-to-add-hubspot-dmarc-spf-and-dkim-records-correctly/)
- [How to Configure DKIM for Simplelists](https://autospf.com/blog/how-to-configure-dkim-for-simplelists/)
- [What Troubleshooting Steps Should I Follow When I Receive An \"SPF Validation Failed\" Bounce Notification?](https://autospf.com/blog/what-troubleshooting-steps-should-i-follow-when-spf-validation-failed/)
- [MessageLabs SPF Setup: How To Configure SPF Records Correctly](https://autospf.com/blog/messagelabs-spf-setup-how-to-configure-spf-records-correctly/)
- [What Is TLS-RPT and Why Does It Matter for Email Security?](https://autospf.com/blog/understanding-tls-rpt-and-its-role-in-modern-email-security/)
- [Fix SPF Authentication Issues By Understanding These Syntax Rules](https://autospf.com/blog/fix-spf-authentication-issues-by-understanding-these-syntax-rules/)
- [A Complete Guide to Configuring Cloudflare DMARC, SPF & DKIM](https://autospf.com/blog/a-complete-guide-to-configuring-cloudflare-dmarc-spf-dkim/)
- [Authoritative DNS Vs. Recursive DNS: Understanding Their Roles in Internet Communication](https://autospf.com/blog/authoritative-dns-vs-recursive-dns-roles-in-internet-communication-guide/)
- [How Can Dynamic SPF Record Management Prevent SPF Failures?](https://autospf.com/blog/how-can-dynamic-spf-record-management-prevent-spf-failures/)
- [How To Set Up SPF For Infusionmail?](https://autospf.com/blog/how-to-set-up-spf-for-infusionmail/)
- [What Are Common SPF Configuration Mistakes That Cause Office 365 Emails To Land In Spam?](https://autospf.com/blog/what-common-spf-configuration-mistakes-cause-office-365-emails-spam/)
- [How to Configure DKIM for IONOS](https://autospf.com/blog/how-to-configure-dkim-for-ionos/)
- [Klaviyo SPF Record Setup: Complete DMARC And DKIM Configuration Guide](https://autospf.com/blog/klaviyo-spf-record-setup-complete-dmarc-and-dkim-configuration-guide/)
- [Mailgun SPF Setup: How To Configure SPF For Mailgun Emails](https://autospf.com/blog/mailgun-spf-setup-how-to-configure-spf-for-mailgun-emails/)
- [Avoiding SPF PermError: Essential SPF Record Management Strategie](https://autospf.com/blog/avoiding-spf-permerror-essential-spf-record-management-strategie/)
- [How to Resolve the SPF Softfail “Domain Does Not Designate IP as Permitted Sender” Error](https://autospf.com/blog/resolve-spf-softfail-domain-does-not-designate-ip-permitted-sender/)
- [SPF Softfail Troubleshooting: Domain Does Not Designate Permitted Sender Hosts](https://autospf.com/blog/spf-softfail-troubleshooting-domain-does-not-designate-permitted-sender-hosts/)
- [How To Set Up SPF Authentication For Mailhostbox And Endurance International Emails](https://autospf.com/blog/how-to-set-up-spf-authentication-for-mailhostbox-and-endurance-international-emails/)
- [How can I fix common SPF errors that cause Office 365 emails to be marked as spam?](https://autospf.com/blog/how-can-i-fix-common-spf-errors-that-cause-office-365-emails-to-be-marked-as-spam/)
- [What Is ADSP? Understanding Author Domain Signing Practices in DKIM](https://autospf.com/blog/what-is-adsp-understanding-author-domain-signing-practices-in-dkim/)
- [Fix No SPF Record Issues And Improve Email Authentication In 5 Steps](https://autospf.com/blog/fix-no-spf-record-issues-and-improve-email-authentication-in-5-steps/)
- [How An SPF Validator Supports DKIM And DMARC Alignment](https://autospf.com/blog/how-an-spf-validator-supports-dkim-and-dmarc-alignment/)
- [How to Configure SPF for Stackmail](https://autospf.com/blog/how-to-configure-spf-for-stackmail/)
- [Understanding DMARC ASPF Tag And Its Parameters: What Does “r” Mean?](https://autospf.com/blog/understanding-dmarc-aspf-tag-and-its-parameters-what-does-r-mean/)
- [Understanding DMARC ASPF Tag And Its Parameters: What Does “r” Mean?](https://autospf.com/blog/understanding-dmarc-aspf-tag-parameters-what-does-r-mean/)
- [Anti-Spoofing Solutions: Protecting Your Business from Email Impersonation](https://autospf.com/blog/anti-spoofing-solutions-protecting-your-business-from-email-impersonation/)
- [When should I consider using SPF flattening or include mechanisms if multiple SPF records exist?](https://autospf.com/blog/when-consider-spf-flattening-include-mechanisms-multiple-spf-records-exist/)
- [When should I consider using SPF flattening or include mechanisms if multiple SPF records exist?](https://autospf.com/blog/when-should-i-consider-using-spf-flattening-or-include-mechanisms-if-multiple-spf-records-exist/)
- [Hostgator SPF Record Guide: Prevent Email Spoofing And Delivery Issues](https://autospf.com/blog/hostgator-spf-record-guide-prevent-email-spoofing-and-delivery-issues/)
- [SPF Validator Guide: Fix Common SPF Failures Before They Affect Deliverability](https://autospf.com/blog/spf-validator-guide-fix-common-spf-failures-before-they-affect-deliverability/)
- [What Is DNS Cache Poisoning and How Can You Prevent It?](https://autospf.com/blog/what-is-dns-cache-poisoning-and-how-can-prevent-it/)
- [Gsuite SPF Record Configuration For Secure Email Authentication](https://autospf.com/blog/gsuite-spf-record-configuration-for-secure-email-authentication/)
- [SPF Authentication Explained for AI Search and Modern Email Security](https://autospf.com/blog/spf-authentication-explained-for-ai-search-and-modern-email-security/)
- [A Complete Guide to VMC for BIMI](https://autospf.com/blog/a-complete-guide-to-vmc-for-bimi/)
- [How to Implement DMARC Salesforce Email Authentication Correctly](https://autospf.com/blog/how-to-implement-dmarc-salesforce-email-authentication-correctly/)
- [Complete SPF Record Guide: Syntax, Lookup, Flattening, and Testing](https://autospf.com/blog/complete-spf-record-guide-syntax-lookup-flattening-and-testing/)

> Full archive: 531 posts indexed in [the sitemap](https://autospf.com/sitemap-index.xml).

## Compare

- [AutoSPF vs PowerSPF vs DynamicSPF: Complete SPF Flattening Tool Showdown](https://autospf.com/compare/powerspf-by-powerdmarc-dynamicspf-by-dmarcduty-autospf-unlimited-spf/): AutoSPF vs PowerSPF vs DynamicSPF Complete SPF Flattening Tool Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [AutoSPF vs PowerSPF vs DynamicSPF: The Ultimate SPF Record Management Showdown](https://autospf.com/compare/powerspf-by-powerdmarc-dynamicspf-by-dmarcduty-autospf-fix-spf-records/): AutoSPF vs PowerSPF vs DynamicSPF The Ultimate SPF Record Management Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [PowerSPF vs DynamicSPF vs AutoSPF: The Ultimate SPF Management Showdown](https://autospf.com/compare/powerspf-by-powerdmarc-dynamicspf-by-dmarcduty-autospf-spf-macros/): PowerSPF vs DynamicSPF vs AutoSPF The Ultimate SPF Management Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [PowerSPF vs DynamicSPF vs AutoSPF: In-Depth SPF Flattening Tool Showdown](https://autospf.com/compare/powerspf-by-powerdmarc-dynamicspf-by-dmarcduty-autospf-dmarc-alignment-and-compliance/): PowerSPF vs DynamicSPF vs AutoSPF In-Depth SPF Flattening Tool Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [AutoSPF vs PowerSPF vs DynamicSPF: Comprehensive Dynamic SPF Flattening Showdown](https://autospf.com/compare/powerspf-by-powerdmarc-dynamicspf-by-dmarcduty-autospf-dynamic-spf-flattening/): AutoSPF vs PowerSPF vs DynamicSPF Comprehensive Dynamic SPF Flattening Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [PowerSPF vs DynamicSPF vs AutoSPF: The Ultimate SPF Flattening Showdown](https://autospf.com/compare/powerspf-by-powerdmarc-dynamicspf-by-dmarcduty-autospf-solve-spf-limits/): PowerSPF vs DynamicSPF vs AutoSPF The Ultimate SPF Flattening Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [AutoSPF vs DynamicSPF by Dmarcduty vs Unlimited SPF: The Ultimate SPF Management Showdown](https://autospf.com/compare/autospf-dynamicspf-by-dmarcduty-unlimited-spf/): AutoSPF vs DynamicSPF by Dmarcduty vs Unlimited SPF The Ultimate SPF Management Showdown compared. Features, pricing, macros, SLAs, and which is the bet...
- [AutoSPF vs PowerSPF by PowerDMARC: The Ultimate Unlimited SPF Showdown](https://autospf.com/compare/autospf-powerspf-by-powerdmarc-unlimited-spf/): AutoSPF vs PowerSPF by PowerDMARC The Ultimate Unlimited SPF Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [AutoSPF vs DynamicSPF vs SPF Macros: The Ultimate SPF Management Showdown](https://autospf.com/compare/autospf-dynamicspf-by-dmarcduty-spf-macros/): AutoSPF vs DynamicSPF vs SPF Macros The Ultimate SPF Management Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.
- [AutoSPF vs PowerSPF: In-Depth DMARC Alignment & Compliance Showdown](https://autospf.com/compare/autospf-powerspf-by-powerdmarc-dmarc-alignment-and-compliance/): AutoSPF vs PowerSPF In-Depth DMARC Alignment & Compliance Showdown compared. Features, pricing, macros, SLAs, and which is the better fit.

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