--- title: "Free Email Security Tools | AutoSPF" description: "Free DNS lookup tools for email authentication. Check SPF records, validate DMARC policies, look up DKIM keys, test BIMI, MTA-STS, and TLS-RPT - all in one place." image: "https://autospf.com/images/og-default.png" canonical: "https://autospf.com/tools/" --- 100% Free - No Account Required # Free Email Security Tools Check SPF, DMARC, DKIM, BIMI, MTA-STS, and TLS-RPT records for any domain. Instant results, no signup. [ Most Popular SPF Record Checker Analyze your SPF record, count DNS lookups, and visualize the full include tree. See if you're over the 10-lookup limit. Use tool ](/tools/spf-checker/)[ New Domain Auth Checker Check all 5 email authentication protocols at once - SPF, DMARC, BIMI, MTA-STS, and TLS-RPT. Get an overall health score. Use tool ](/tools/domain-auth-checker/)[ DMARC Record Checker Validate your DMARC policy, check alignment settings, and see if aggregate reporting is configured correctly. Use tool ](/tools/dmarc-checker/)[ New DMARC Report Analyzer Drop a DMARC aggregate report (XML or .gz) and instantly see senders, pass rates, alignment, and per-record details. Parsed in your browser. Use tool ](/tools/dmarc-report-analyzer/)[ DKIM Record Lookup Auto-discover DKIM records across 50+ selectors. Identify SendGrid, Google Workspace, Microsoft 365, and 100+ providers - or look up a specific selector. Use tool ](/tools/dkim-lookup/)[ BIMI Checker Check your BIMI record, preview your brand logo, and verify VMC certificate status for any domain. Use tool ](/tools/bimi-checker/)[ MTA-STS Checker Validate MTA-STS DNS records and policy files. Check TLS enforcement mode, authorized MX hosts, and policy cache duration. Use tool ](/tools/mta-sts-checker/)[ New SPF Record Generator Build a valid SPF record in 60 seconds. Select your email providers, add custom IPs, choose your policy - copy the result into your DNS. Use tool ](/tools/spf-record-generator/)[ SPF Record Lookup Look up any domain's SPF record from live DNS. See the raw record, expand nested includes, and count lookups. Use tool ](/tools/spf-record-lookup/)[ SPF Validator Validate any SPF record for syntax errors, DNS lookup violations, void lookups, and full RFC 7208 compliance. Use tool ](/tools/spf-validator/)[ SPF Glossary Reference guide for SPF mechanisms, qualifiers, and modifiers. Understand ip4, include, redirect, all, and more. Use tool ](/spf-glossary/)[ New Email Header Analyzer Paste raw email headers and instantly see the full delivery path with per-hop time delays, plus SPF, DKIM, and DMARC results. Hosted on Mailflow Monitoring. Use tool ](https://mailflowmonitoring.com/tools/email-header-analyzer/?utm%5Fsource=autospf&utm%5Fmedium=tools%5Fdirectory) Protocol Reference ## What These Tools Check SPF TXT @ domain Which servers can send email as your domain DMARC TXT @ \_dmarc.domain What to do when SPF or DKIM fails DKIM TXT @ selector.\_domainkey.domain Cryptographic email signature verification BIMI TXT @ default.\_bimi.domain Brand logo display in email clients MTA-STS TXT @ \_mta-sts.domain + policy file Force TLS encryption for inbound email TLS-RPT TXT @ \_smtp.\_tls.domain Report TLS connection failures ## Too many DNS lookups? AutoSPF automatically flattens your SPF record and keeps it within the 10-lookup limit. Setup takes 60 seconds. [View Plans & Pricing→](/pricing/) Rated 5/5 on G2 · Trusted since 2018 ## Trusted by 2,000+ Businesses ### "Helped us go beyond capacity" > AutoSPF did exactly as described, it helped us get past our 10 lookup limit. Afterwards, we hit another limit regarding overall capacity and when contacted, they quickly provided us with a new solution to eliminate capacity issues entirely going forward, so now we can add as many SPF records as needed. They also provided us with a personalized support video explaining their new method in its entirety using our instance as the example. VU Verified User Financial Services · Mid-Market (51-1000 emp.) ### "Great service and great support" > AutoSPF was easy to initially set up on our own and a great cost effective entry into spf flattening. Needed our first support assistance today and got great response including a video demonstrating the issue I was trying to solve, a quick fix, and more detailed followup. GF Greg F. Mid-Market (51-1000 emp.) ### "Robust and useful product with incredible support" > AutoSPF is a simple tool to solve a significant problem. It does it so very well without any issues. Additionally, the support is very professional and goes above and beyond to help resolve any email-related issues for their customers. VU Verified User Insurance · Mid-Market (51-1000 emp.) [Read our reviews on G2 ](https://www.g2.com/products/autospf/reviews) ```json {"@context":"https://schema.org","@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com","logo":{"@type":"ImageObject","url":"https://autospf.com/images/autospf-logo.png"},"description":"Automatic SPF flattening and email authentication management. 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It gives you an overall score and specific insights for each protocol."}},{"@type":"Question","name":"How does the SPF Record Checker work?","acceptedAnswer":{"@type":"Answer","text":"The SPF checker retrieves your domain's SPF TXT record, recursively resolves all include mechanisms, counts DNS lookups against the RFC 7208 limit of 10, and builds a visual tree showing exactly how your SPF record is structured."}}]} ``` ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://autospf.com/"},{"@type":"ListItem","position":2,"name":"Tools","item":"https://autospf.com/tools/"}]} ``` ```json {"@context":"https://schema.org","@type":"Product","name":"AutoSPF","url":"https://autospf.com","aggregateRating":{"@type":"AggregateRating","ratingValue":5,"reviewCount":21,"bestRating":5,"worstRating":1},"review":[{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":5,"bestRating":5},"author":{"@type":"Person","name":"Verified User","jobTitle":"Financial Services"},"datePublished":"2025-07-31","reviewBody":"AutoSPF did exactly as described, it helped us get past our 10 lookup limit. 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