MX Server Lookup (Mail Server Lookup)

A Mail eXchanger record (MX record) is a type of resource in the Domain Name System that specifies a mail server that is authorized to accept mail messages on behalf of the target domain, and contains a priority value if multiple mail servers are available. The set of MX records for a domain name specifies how requests to send mail can be routed using the Simple Mail Transfer Protocol (SMTP).

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