Check a domain's MX records
Enter a domain and click "Check MX".
MX records tell other servers where to deliver the domain's email.
MX record generator
Start from a provider preset, load the records from a lookup, or type your own.
fills the list below; Microsoft 365 needs your domain
lower is tried first (0-65535)
a hostname with an A/AAAA record, never an IP or a CNAME
Record preview
No existing records loaded yet — run a lookup above first.