Mail Exchanger (MX) Records
A Mail Exchanger (MX) record indicates which resources are available for Simple Mail Transfer Protocol (SMTP) mail reception. MX records can be set on a domain basis so that mail sent to a particular domain will be forwarded to the server or servers indicated by the MX record. For example, if an MX record is set for the domain companyabc.com, all mail sent to user@companyabc.com will be automatically directed to the server indicated by the MX record.
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