See the mail servers a domain uses to receive email, with priorities.
MX (Mail Exchange) records tell the world which servers accept mail for a domain. Lower priority numbers are tried first.
Enter any domain to see where its mail is hosted (for example Google Workspace, Microsoft 365, or a custom server). If there are no MX records, the domain cannot receive email.
DeliverSignal runs these checks daily and alerts you when something breaks.
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