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The characteristic payload information of an MX record [1] is a preference value (above labelled "Priority"), and the domain name of a mailserver ("Host" above).. The priority field identifies which mailserver should be preferred - in this case the values are both 10, so mail would be expected to flow evenly to both onemail.example.com and twomail.example.com - a common configuration.
Mail destination (MD) and mail forwarder (MF) records; MAILA is not an actual record type, but a query type which returns MF and/or MD records. RFC 973 replaced these records with the MX record. MF 4 MAILA 254 MB 7 RFC 883 Not formally obsoleted. Unlikely to be ever adopted (RFC 2505).
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A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a * as the leftmost label (part) of a domain name, e.g. *.example.com. The exact rules for when a wildcard will match are specified in RFC 1034, but the rules are neither intuitive nor clearly ...
ttl: standard DNS time to live field. IN: standard DNS class field (this is always IN). SRV: Type of Record (this is always SRV). priority: the priority of the target host, lower value means more preferred. weight: A relative weight for records with the same priority, higher value means higher chance of getting picked.
MXlo means DNS resource records of the MX type [1] that have a value of localhost.The name comes from combining the MX from Mail eXchange and the lo abbreviation for a loopback networking interface, and is an anti-spam technique that is growing in popularity with network administrators who manage a large number of unused legacy domain names.
This is a list of notable managed DNS providers in a comparison table. A managed DNS provider offers either a web-based control panel or downloadable software that allows users to manage their DNS traffic via specified protocols such as: DNS failover , dynamic IP addresses , SMTP authentication , and GeoDNS .
Round-robin DNS is often used to load balance requests among a number of Web servers. For example, a company has one domain name and three identical copies of the same web site residing on three servers with three IP addresses. The DNS server will be set up so that domain name has multiple A records, one for each IP address.