Free Email Tools
Diagnostic, security, and developer utilities engineered to help you build bulletproof email templates, configure domain authentication, and maximize primary inbox delivery.
Email Health Checker
All-in-one DNS deliverability check. Audit MX servers, validate SPF lookup counts and syntax, evaluate DMARC enforcement policies, check DKIM public keys, test BIMI avatars, and verify Google & Yahoo bulk sender compliance.
- MX routing & redundancy
- SPF 10-lookup validation
- DMARC policy scoring
- BIMI avatar & DKIM audit
Domain & IP Blacklist Check
Scan sending domains and mail server IP addresses against 18+ real-time DNSBL, RBL, and DBL databases including Spamhaus, Barracuda, SpamCop, and SURBL. Instant reputation scoring with official delisting guides.
- 18+ real-time DNSBLs & DBLs
- Auto domain & IP detection
- Reverse DNS (PTR) audit
- Direct removal & delisting links
DMARC Record Checker & Validator
Query live DNS records or inspect raw strings. Test RFC 7489 syntax compliance, analyze policy levels (none, quarantine, reject), evaluate SPF/DKIM alignment, and audit 2024 Google & Yahoo bulk sender requirements.
- Live DNS & DoH resolution
- Health score out of 100
- RFC 7489 tag diagnostics
- One-click copy & fix
DMARC Generator
Construct a rock-solid, production-ready DMARC TXT record in seconds. Features guided 3-phase rollout presets (monitoring to strict reject), aggregate telemetry reporting, and registrar guides for Cloudflare, Route 53, and GoDaddy.
- Phase 1-3 roadmap presets
- Automated rua mailto formatting
- Custom percentage enforcement
- Registrar step-by-step guides
Email Header Analyzer
Paste raw email headers to audit SPF, DKIM, DMARC, and ARC authentication. Trace relay delivery hops, uncover SMTP latency bottlenecks, inspect in-transit TLS encryption, and audit RFC 8058 one-click unsubscribe compliance.
- SPF, DKIM & DMARC audit
- Relay hop delay waterfall
- TLS encryption inspector
- RFC 8058 unsubscribe check
Email Template CSS Compatibility Checker
Paste HTML email code to audit CSS compatibility across Outlook, Gmail, and Apple Mail. Detect unsupported styles, missing media queries, and preview responsive rendering in phone, tablet, and desktop viewports in real time.
- Live iframe previewer
- Outlook MSO tag detector
- Responsive layout tester
- HTML/CSS validator
SPF Record Flattening Tool
Count DNS lookups against the strict RFC 7208 10-lookup limit. Recursively resolve nested includes down to pure CIDR IP subnets and generate flattened SPF records to avoid Google & Yahoo PermError bounces.
- 10-lookup limit audit
- Recursive include tree
- Deduplicated CIDR subnets
- Automatic sub-record splitting
Inbox Placement & Spam Score Tester
Pre-flight your email campaign before broadcasting. Predict whether your message lands in the Primary Inbox, Promotions Tab, or Spam Folder across Google, Microsoft, Yahoo, and Apple Mail.
- Gmail Primary vs Promo tab
- Spam trigger keyword scan
- Authentication alignment
- Provider inbox % breakdown
Ready to Upgrade Your Sending Infrastructure?
EmailSendy provides enterprise SMTP gateways, dedicated warm-up IPs, automated list verification, and 1-on-1 deliverability architecture consulting.