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
Build a valid DMARC record by answering a few questions, with a plain explanation of what every tag does and a warning when a choice will cost you delivery.
Email cost calculator
Put in your team size and list size and see what fourteen email providers actually charge you a month, from prices we checked by hand in August 2026.
Email header analyzer
Paste raw email headers to read SPF, DKIM and DMARC results, check DKIM alignment with the From address, and see the delivery path. Free, in your browser.
SPF, DKIM and DMARC checker
Free DMARC checker, DKIM checker and SPF checker in one: read any domain's live DNS, count SPF lookups against the limit of 10, and see what each result means.
Email warm up schedule generator
Build a 28 day sending ramp for a new domain from your list size and relay cap, using the same ramp table our send path enforces in code.