Verify MX records and priority for any domain.
MX (Mail Exchanger) records tell the world which servers accept email for your domain. Each MX record has a hostname and a priority number; lower number means higher priority. This tool looks up and displays all MX records for a domain so you can verify order, hostnames, and that they resolve. Use it after changing mail providers, to confirm migration, or to debug "mail not received" issues. Incorrect or missing MX records cause bounces or delivery to the wrong server.
Lower number = higher priority. Senders try the lowest-numbered MX first, then fall back to higher numbers if needed.
Yes. Multiple MXs provide redundancy; often one is primary and others are backups.
Yes. The MX hostname must resolve to an IP. Senders look up the MX name to connect.
Check MX order and that no old MX with higher priority (lower number) still points to the previous provider.
Same as other DNS: up to TTL, and possibly up to 24–48 hours depending on caches.