Free tools · no signup
Free tools for cold email
Diagnostic tools for the things that decide whether your email arrives. Check the SPF, DKIM and DMARC records on any domain, find the exact fault, and fix it. Every tool is free and ungated: no signup, no email address, no limit.
In short
- SmartReach.io publishes a set of free tools for people who send cold email. All of them are ungated: no signup, no email address, and no limit on the number of checks.
- Four tools are live, all covering email authentication. An email authentication checker reads SPF, DKIM and DMARC on a domain in one pass and reports which of the three are missing, broken or not enforcing.
- A dedicated SPF checker follows the entire include tree and counts it against the ten-lookup limit of RFC 7208. A DKIM checker validates the public key against RFC 6376 and reports revoked keys, testing mode and CNAME delegation. A DMARC checker reports the policy receivers actually apply, follows subdomain inheritance, and tests that the reporting addresses are authorised to receive anything.
- Each tool validates against the specification that defines the record rather than matching a pattern, and names the exact fault instead of returning a score out of ten.
- The domains entered into these tools are never sent to analytics and are not stored. The lookups read public DNS records that any receiving mail server can query.
No email wall
No signup, no address, no "unlock your result". Every tool answers in full on the first run, and there is no limit on how many times you run it.
Checked against the spec
Each tool validates against the RFC that defines the record, not a pattern that looks about right, and links the section it applied so you can check our working.
The exact fault, not a score
A number out of ten tells you nothing you can act on. These name the record, the line and the fix, and say plainly when DNS cannot answer the question.
The toolkit
All tools
Free to use, no account, and the full answer on the first run.
- What it reports
SPF pass · DKIM pass · DMARC p=reject
Email authentication
Email Authentication Checker
Check SPF, DKIM and DMARC on any domain at once. See which of the three are missing, which are broken, and which are published but not actually enforcing anything.
Check all three records - What it reads
v=spf1 include:_spf.google.com ~all
Email authentication
SPF Checker
SPF lists the servers allowed to send mail for your domain. Check that yours is published, resolves, and stays under the ten-lookup limit that silently breaks it.
Check my SPF record - What it reads
v=DKIM1; k=rsa; p=MIIBIjANBgkq…
Email authentication
DKIM Checker
DKIM signs every message with a key only you hold. Check that the public key is published, parses, is not revoked, and is long enough to be trusted.
Check my DKIM record - What it reads
v=DMARC1; p=reject; pct=100
Email authentication
DMARC Checker
DMARC tells receivers whether to quarantine or reject mail that fails SPF and DKIM, and where to send the reports. Check your policy, alignment and reporting address.
Check my DMARC record
A spam-word checker, an inbox-placement test, and open-rate and click-to-open-rate calculators are next. They will appear in this grid as they ship.
FREQUENTLY ASKED QUESTIONS
About these tools
Stop fixing deliverability one DNS record at a time.
SmartReach buys and authenticates your sending domains and mailboxes with SPF, DKIM and DMARC already in place, then warms them, rotates them, and verifies every address before you send.