Free email tools
Check your domain’s SPF, DKIM, DMARC and MX against live DNS, build a valid DMARC record, and price fourteen providers. Free, no signup, nothing stored.
DMARC record generator
A free DMARC generator: build a valid record by answering a few questions, with a plain explanation of every tag and a warning when a choice costs delivery.
Email cost calculator
A free email cost calculator: enter your team size and list size to see what fourteen providers charge a month, from prices we checked by hand in August 2026.
Email header analyzer
A free email header analyzer: paste raw headers to read SPF, DKIM and DMARC results, check alignment with the From address, and see the full delivery path.
SPF, DKIM and DMARC checker
Free DMARC checker, DKIM checker and SPF checker in one: read a domain's live DNS, count SPF lookups against the limit of 10, and see what each result means.
Email warm up schedule generator
A free email warm up schedule: build a 28 day ramp for a new domain from your list size and relay cap, using the same table our send path enforces in code.
