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The computer file hosts is an operating system file that maps hostnames to IP addresses.It is a plain text file. Originally a file named HOSTS.TXT was manually maintained and made available via file sharing by Stanford Research Institute for the ARPANET membership, containing the hostnames and address of hosts as contributed for inclusion by member organizations.
On the ARPANET, hosts were given names to be used in place of numeric addresses. Owners of new hosts sent email to HOSTSMASTER@SRI-NIC.ARPA to request an address. A file named HOSTS.TXT was distributed by the NIC and manually installed on each host on the network to provide a mapping between these names and their corresponding network address ...
A TXT record (short for text record) is a type of resource record in the Domain Name System (DNS) used to provide the ability to associate arbitrary text with a host or other name, such as human readable information about a server, network, data center, or other accounting information.
Using a simpler, more memorable name in place of a host's numerical address dates back to the ARPANET era. The Stanford Research Institute (now SRI International) maintained a text file named HOSTS.TXT that mapped host names to the numerical addresses of computers on the ARPANET.
host.subdel.example. A No wildcard will match because subdel.example. exists and is a zone cut, putting host.subdel.example. into a different DNS zone. Even if host.subdel.example. does not exist in the other zone, a wildcard will not be used from the parent zone. ghost.*.example. MX
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RP may be used for certain human-readable information regarding a different contact point for a specific host, subnet, or other domain level label separate than that used in the SOA record. X25 19 Not in current use by any notable application ISDN 20 Not in current use by any notable application RT 21 Not in current use by any notable application
Most email software and applications have an account settings menu where you'll need to update the IMAP or POP3 settings. When entering your account info, make sure you use your full email address, including @verizon.net, and that the SSL encryption is enabled for incoming and outgoing mail.