Free tool
Whether your email arrives, whether it can be impersonated, and whether the records meant to prevent that are actually working.
No account, no card, no limit on how often you run it.
Most mail checkers return the raw records and leave you to interpret them. That is fine if you already know what a DMARC policy of quarantine implies for a third-party sender, and unhelpful otherwise.
This one answers the two questions people actually have. Can somebody send email pretending to be us. Is our own mail being delivered or filtered without a bounce.
The raw records are shown underneath for whoever needs them.
It shows where things stand today, and forgets you were here the moment you close the tab. Every free checker works this way, including the well-known ones.
Watching the same domain and keeping the answers is the paid product. It starts at $15 a month and the record begins the day you do.
One check covering registration, certificate, mail, subdomains and hosting.