Free Email Security Tools
Check SPF, DMARC, DKIM, BIMI, MTA-STS, and TLS-RPT records for any domain. Instant results, no signup.
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 NewDomain Auth Checker
Check all 5 email authentication protocols at once - SPF, DMARC, BIMI, MTA-STS, and TLS-RPT. Get an overall health score.
Use toolDMARC Record Checker
Validate your DMARC policy, check alignment settings, and see if aggregate reporting is configured correctly.
Use tool NewDMARC 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 toolDKIM 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 toolBIMI Checker
Check your BIMI record, preview your brand logo, and verify VMC certificate status for any domain.
Use toolMTA-STS Checker
Validate MTA-STS DNS records and policy files. Check TLS enforcement mode, authorized MX hosts, and policy cache duration.
Use tool NewSPF 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 toolSPF Record Lookup
Look up any domain's SPF record from live DNS. See the raw record, expand nested includes, and count lookups.
Use toolSPF Validator
Validate any SPF record for syntax errors, DNS lookup violations, void lookups, and full RFC 7208 compliance.
Use toolSPF Glossary
Reference guide for SPF mechanisms, qualifiers, and modifiers. Understand ip4, include, redirect, all, and more.
Use tool NewEmail 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 toolWhat These Tools Check
Too many DNS lookups?
AutoSPF automatically flattens your SPF record and keeps it within the 10-lookup limit. Setup takes 60 seconds.
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.
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.
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.
Verified User
Insurance · Mid-Market (51-1000 emp.)