SPF Tools

Automatically construct your SPF record. Our smart DNS crawler scans live A and MX records to detect your email providers and auto-suggest the perfect RFC-compliant policy.

Fix broken SPF records instantly. Automatically merge multiple SPF TXT records, remove dangerous +all policies, clean deprecated ptr mechanisms, and deduplicate your authorized senders visually.

Verify your domain enforces a strict SPF Hard Fail (-all) policy. Block unauthorized senders, stop phishing attacks, and maximize your email security.

Verify your domain uses the recommended Soft Fail (~all) policy. Balance strong anti-spoofing protection with seamless deliverability for forwarded emails.

Simulate how receiving mail servers evaluate your SPF record. Trace the exact MTA evaluation process step-by-step, match sender IPs against CIDR subnets, and detect PermError failures.

Verify your SPF record propagation worldwide. Concurrently query 5 global DNS backbone resolvers to calculate exact propagation percentages and detect majority consensus.

Stop silent email delivery failures. Calculate your exact SPF lookup cost, enforce the strict RFC 7208 10-lookup limit, and discover hidden third-party includes.

Bypass the 10 DNS lookup limit with our automated SPF flattening tool. Resolve nested includes into raw IPs, deduplicate networks, and fix 255-character length errors instantly.

Trace your SPF hierarchy with an interactive network graph. Click nodes to peek at raw DNS records, identify color-coded mechanisms, and track per-node lookup limits in real-time.

Bypass the 10 DNS lookup limit. Automatically flatten complex SPF trees by recursively extracting and deduplicating all raw IPs into a single optimized record.

Visually trace nested SPF includes and redirects. Build a dependency tree, calculate per-branch DNS lookup costs, and detect infinite loops to optimize your architecture.

Analyze your SPF and DMARC policies to detect email spoofing vulnerabilities. Get an actionable protection score, audit enforcement strictness, and secure your brand reputation.

Perform a deep security audit on your SPF record. Detect dangerous +all policies, overly broad subnet exposures, missing catch-alls, and deprecated ptr mechanisms to stop email spoofing.

Fetch live SPF records using global DNS resolvers. Inspect raw DoH JSON responses, analyze live TTL data, and detect multiple conflicting SPF records instantly.

Perform a deep, recursive validation of your SPF record. Chase nested includes down the DNS tree, calculate your exact DNS lookup count, and detect fatal infinite loops.

Recursively extract every authorized IP from your SPF tree. Audit third-party risks, verify CIDR networks, and check sender reputations against global RBL blacklists.

Visually build valid, RFC-compliant SPF records. Utilize one-click presets for third-party email providers, configure strictness policies, and export ready-to-deploy Terraform and BIND code.

Perform a live DNS query to discover and verify your domain's SPF record. Check published TXT records, view authorized IP addresses, and ensure active email authentication.

Parse and validate your SPF record syntax. Detect formatting errors, check the 10 DNS lookup limit, verify mechanisms, and ensure RFC 7208 compliance.

Verify your email's SPF alignment. Check the Return-Path against the Header From address to ensure strict DMARC compliance and prevent email spoofing.