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Free tools for better cold email

A growing kit of deliverability checkers, record generators, calculators and copy tools — built by the MailOptimal team to help you reach more inboxes and book more meetings. Every tool runs free, right in your browser.

11Free tools
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Deliverability & Authentication5 tools

Diagnose the DNS records that decide whether your cold email lands in the inbox or in spam.

Flagship Domain Health Checker Score your SPF, DKIM, DMARC and MX setup in one go, with an A–F grade. Check my domain SPF Record Checker Look up and validate the SPF record that authorizes who can send as you. Check SPF record DMARC Record Checker Check whether your domain publishes a DMARC policy against spoofing. Check DMARC record DKIM Record Checker Validate your DKIM key so your mail can be cryptographically signed. Check DKIM record MX & DNS Record Lookup Look up MX, TXT, A, NS and CNAME records for any domain. Look up records
Record Generators2 tools

Build correct SPF and DMARC records from your sending setup — copy-ready, no guesswork.

SPF Record Generator Assemble a valid SPF record from the providers you send through. Generate SPF record DMARC Record Generator Build a DMARC record plus a safe none → quarantine → reject rollout. Generate DMARC record
Calculators2 tools

Plan your infrastructure and project your pipeline before you spend a dollar.

Cold Email Setup Calculator Find out exactly how many mailboxes and domains your volume needs. Calculate my setup Cold Email ROI Calculator Project meetings, customers and revenue from a planned send volume. Calculate my ROI
Content & Copy2 tools

Tighten your messaging — beat spam filters and polish your sending signature.

Email Spam-Word Checker Score your cold email copy for spam triggers before you hit send. Scan my email Email Signature Generator Build a clean, copy-ready HTML email signature in seconds. Generate signature
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