Assess the health of an email domain

Domain owners and mail administrators get a broad diagnosis before a migration or while investigating rejected and poorly delivered messages.

Bring MX, SPF, DMARC, MTA-STS and TLS-RPT signals together in one readable domain health summary, with the most urgent fixes clearly surfaced.

How to use

Enter the domain used by your email addresses, the part after the at sign, without the site prefix or any mailbox name.
Launch the test: several public lookups run in sequence to gather the records that relate to mail delivery.
Work through the report family by family and note what is missing or looks contradictory.
Prioritise anything affecting delivery and authentication, then pass the list to whoever manages your DNS zone.
Run the check again after your edits to confirm that the new records are visible.

Example

A company notices that its messages land in spam at some recipients. Before switching providers, the team reviews the sending domain to see whether the authentication records are published and consistent, which usually points to the fix.

Limits and formats

The report describes what is published in public DNS, not the real quality of your sending or your domain reputation.
Changes take time to spread, so a record you just added may still be absent from the result.
Some signals rely on a file published on a website; if that file cannot be reached, no conclusion can be drawn.
The report helps with diagnosis, but fixes are made in your provider DNS zone.

Where processing happens

This check is a network operation: the domain you type is sent to the YOORfree server, which queries public DNS and the files published for your domain, then returns a summary. No file is uploaded from your device.

Frequently asked questions

Can I check a domain I do not own?

Yes, the lookup only uses public information, so any domain can be examined. You will not be able to fix anything without access to the matching DNS zone, but the report still helps explain why messages are being refused.

Should I repeat the test after every change?

It is worth doing, because an edit does not become visible everywhere at the same moment. Wait a little, run the check again and compare with the previous reading to confirm the new record now appears.

Does the report guarantee my emails will reach the inbox?

No. It confirms that several public records exist and agree with each other, which removes some causes of rejection. Other factors such as sending reputation, list hygiene and message content also affect where your mail ends up.