If multiple records have the same priority, then one will be chosen at random as a means to spread the load over multiple email servers. In the case that the mail server specified in the record with the lower value returns an error when attempting to deliver mail, the next highest priority MX record will be used. Lower priority records are always tried first when attempting to deliver mail. In many cases multiple MX records are added to a domain name, this allows for primary and secondary (backup) mail servers as well as a form of load balancing. This means that when a record has had updates made to it, then it will take 1 hour to update. This is the address of the server which should handle email for this domain.ģ600 is the TTL (time to live) of the record in seconds, this example represents 1 hour. The lower the value, the higher the priority. represents the domain of the record.ġ0 is the priority of the record.
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