Free deliverability tools
Free deliverability tools
We built these to onboard sending domains. They work just as well on somebody else's. No account, no rate limit, and no email capture — the point is that they are genuinely useful, not that they collect you.
Free, and no signup: these run the same verification engine SadaSend uses on customers’ sending domains. We do not record what you check.
- SPF checkerCheck an SPF record, resolve every include, and count DNS lookups against the limit of ten.
- DKIM validatorFetch a DKIM public key by selector, check the key length, and verify the record parses.
- DMARC checkerParse a DMARC record and explain what it actually does to mail that fails authentication.
- MX lookupResolve a domain's mail exchangers, check priorities, and flag common misconfigurations.
- Blocklist checkQuery major blocklists for an IP address or sending domain.
- Inbox placement testSend one message to seed addresses across major providers and see where it actually lands.