Inbox test
Send one message to a one-time address and see what a receiving mail server makes of it. SPF, DKIM and DMARC as they actually resolved for that message, the spam score it earned, reverse DNS on the sending host, and whether that host sits on a blocklist.
No account and no e-mail of yours. We hand you a one-time address, you send a message to it, and the report is yours alone unless you choose to share it.
What this answers that a DNS lookup cannot
A record check reads what you published. This reads what you sent. The two disagree more often than people expect, because the record is only half of the arrangement: the other half is whichever service actually put the message on the wire, and whether it signed with a key your domain authorises.
That is why a domain can pass every record check and still land in spam. The message is the evidence, and this is the only tool here that looks at one.
What we keep
The address is one-time and short-lived. The report is reachable only with the token this page holds, which lives in your browser tab and nowhere else, and a report becomes readable by anyone else only if you choose to share it.
Subject and body are withheld from the report when they look like they carry personal data. The headers are always shown, because they are the evidence the score is built from.
Start with the domain you worry about most
We built these checks for our own mail and run them against our own domains every day. The free plan covers one domain and needs no card.