What you’ll need
A public domain; provide a DKIM selector if you want its record inspected.
Email TOOL · FREE TO USE
Email Authentication Checker & Record Builder
Understand published SPF, DKIM and DMARC records.
Free to use · No saved inputsYour email workspace
How it works
Bounded DNS-only queries and syntax/policy checks; draft DMARC/SPF records.
Know the limits
DNS health cannot prove inbox delivery or authenticate a particular message. No DNS changes are made.
GET FROM A QUESTION TO A NEXT STEP
Get a clearer result with Email Authentication Checker & Record Builder
Understand published SPF, DKIM and DMARC records. A public domain; provide a DKIM selector if you want its record inspected. Review the supported scope below before adding a large file or using the result in a campaign.
How to use Email Authentication Checker & Record Builder
Open Email Authentication Checker & Record Builder and inspect its input labels. A public domain; provide a DKIM selector if you want its record inspected.
Read the DNS disclosure, enter a public domain and confirm the public check. No message, mailbox password or private key is needed.
Run the workflow, read any warnings and inspect the output. Download the result only after checking the values or file preview; clear the workspace when finished.
What do the results mean?
Bounded DNS-only queries and syntax/policy checks; draft DMARC/SPF records. DNS health cannot prove inbox delivery or authenticate a particular message. No DNS changes are made.
What to do next
Check a small representative input first. For exported assets, reopen the downloaded file in its intended application before using it in production.
Keep the scope in mind
DNS health cannot prove inbox delivery or authenticate a particular message. No DNS changes are made.
Common questions about Email Authentication Checker & Record Builder
Does Email Authentication Checker & Record Builder save my input?
The public domain and selector are sent to this server and its DNS resolver. The application does not save the request or report. Hosting may process ordinary request metadata.
What should I do if a result is unavailable?
Check the input format, units and limits. DNS health cannot prove inbox delivery or authenticate a particular message. No DNS changes are made. An unavailable result does not establish that a campaign, document or email address is valid or invalid.