Useful things, no signup.
Calculators and generators for the problems email operators actually hit. Every one runs entirely in your browser — nothing is uploaded, nothing is stored, and none of them ask for your address.
What email actually costs you.
Deliverability tools
DMARC record generator
Build a valid DMARC record, with every tag explained in plain English.
Open tool →FREEBulk domain auth auditor
Check SPF, DKIM, DMARC and MX across up to 50 domains at once.
Open tool →FREESending domain planner
Plan subdomains, streams and DNS records across every brand you send for.
Open tool →FREESPF lookup limit analyser
Walk your include chain and count against the 10-lookup limit.
Open tool →FREEWhy did DMARC fail?
Paste headers and find out why DMARC failed when SPF passed.
Open tool →FREEIP & domain warmup planner
Generate a day-by-day sending ramp for a new domain or IP.
Open tool →Compliance tools
Content tools
Being built next.
Listed here rather than kept in a private roadmap. If one of these would be useful sooner, tell us and it moves up.
- Deliverability scorecardScore your bounce, complaint and delivery rates against real thresholds.
- Lawful basis wizardWork out which lawful basis applies and what evidence you need to keep.
Tools are free.
So is Sandbox.
Try the product.
Brands, consent records, providers, and workflows in test mode — before you pay anything.