Prove control with a one-time DNS TXT record, then keep a private history of bounded DNS checks.
Monitoring is limited to public DNS evidence. It never fetches a domain-supplied URL and does not claim mailbox existence, SMTP reachability or delivery.
A random TXT challenge at _mailcheckers.your-domain must be found before checks begin. Unfinished challenges expire after 24 hours.
The report is authenticated with a high-entropy secret shown once. Only its hash is stored, and it is never placed in browser storage.
Check history is retained for 30 days. Pause and resume require verified ownership; delete erases the monitor and its history.
Not currently. Without a configured and authorized delivery channel, changes appear only in your private report.
No. It uses fixed public DNS-over-HTTPS lookups only; domain-supplied URLs are never fetched.