Free DNS and Email Checker Tools
Checks you can run in a second, with no account.
Enter a domain or a company name and read the result on the page. There is no sign-up, and nothing is kept beyond what the check needs to run.
Email Spoofing Test
Shows whether someone else could send mail that appears to come from your domain, judged from the records your domain publishes.
DMARC Checker
Reads your DMARC record and explains what it tells receiving servers to do with mail that fails, and where the reports go.
SPF Checker
Lists the servers your SPF record allows to send for your domain and flags lookups or syntax that would make the record fail.
DKIM Checker
Looks up the DKIM key for the selector you enter and confirms it is published and readable, so signed mail can be verified.
MX Lookup
Shows the servers that receive email for a domain, in priority order, so you can confirm mail is heading where you expect.
Three checks decide whether a message reaches the inbox.
Every message that claims your domain meets SPF, DKIM and DMARC at the receiving server. SPF names the servers allowed to send, DKIM proves the content arrived unaltered, and DMARC tells the receiver what to do when either one fails. The checks above read all three from public DNS.
About the tools.
A question the page does not answer can be sent in writing, and the reply comes within one business day.
Is there a charge for these checks?
No. Every check here is open to anyone, and none of them asks you to create an account first.
What do you store when I run a check?
The check reads public records, shows you the answer and keeps nothing beyond what it needs to finish. There is no email address to hand over and no profile built from what you look up.
Why does an agents agency publish these?
The agents we build depend on both. An agent that replies by email is only useful when its mail lands in the inbox, and an agent that deals with other businesses needs to know those businesses are who they claim to be. We rely on these checks in our own work and keep them open for yours.
Not sure what you need? Ask in writing.
Describe the work in a few lines. We will reply in writing within one business day with what we would build and how.