~/tools / mx-lookup

MX Lookup

Check MX records and detect mail provider. Lists records by priority with their resolved IPs.

>
[ OK ] MX configured. Detected provider: Microsoft 365.
── output ─────
Provider: Microsoft 365
PriorityMail serverIPs
10 mx2.heinlein-support.de 91.198.250.20
10 mx1.heinlein-support.de 91.198.250.10
20 mx3.heinlein-support.de 91.198.250.30
300 sparkasse-de.mail.protection.outlook.com 52.101.73.11, 52.101.73.8, 52.101.68.39, 52.101.73.28
// Save sparkasse.de → we'll run this daily and alert on changes. /signup →