~/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: FastMail.
── output ─────
Provider: FastMail
PriorityMail serverIPs
10 in1-smtp.messagingengine.com 103.168.172.221, 103.168.172.223, 103.168.172.220, 103.168.172.222, 103.168.172.217, 103.168.172.218, 103.168.172.216, 103.168.172.219
20 in2-smtp.messagingengine.com 202.12.124.217, 202.12.124.216, 202.12.124.219, 202.12.124.218
// Save fastmail.com → we'll run this daily and alert on changes. /signup →