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A mail exchange (MX) record specifies the mail server responsible for accepting email messages in the Domain Name System (DNS) of a domain name.

Synonyms:
MX
MX Record (Wikipedia)

A mail exchanger record (MX record) specifies the mail server responsible for accepting email messages on behalf of a domain name. It is a resource record in the Domain Name System (DNS). It is possible to configure several MX records, typically pointing to an array of mail servers for load balancing and redundancy.

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