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Operating Systems Linux Red Hat DNS A-Record point to another DNS Post 302558920 by mark54g on Sunday 25th of September 2011 11:39:31 PM
Old 09-26-2011
You want DNS forwarders.

DNS HOWTO : Forwarding

Also, DNS is not a "kernel" so I have no idea why you mentioned that. Also your DNS client can have their search string append different domains to the DNS search.
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Net::DNS::Mailbox(3)					User Contributed Perl Documentation				      Net::DNS::Mailbox(3)

NAME
Net::DNS::Mailbox - DNS mailbox representation SYNOPSIS
use Net::DNS::Mailbox; $mailbox = new Net::DNS::Mailbox('user@example.com'); $address = $mailbox->address; DESCRIPTION
The Net::DNS::Mailbox module implements a subclass of DNS domain name objects representing the DNS coded form of RFC822 mailbox address. METHODS
new $mailbox = new Net::DNS::Mailbox('John.Doe@example.com'); $mailbox = new Net::DNS::Mailbox('John Doe <j.doe@example.com>'); Creates a mailbox object which represents the DNS domain encoded form of the mail address specified by the character string argument. The argument string consists of printable characters from the 7-bit ASCII repertoire. address $address = $mailbox->address; Returns a character string corresponding to the RFC822 form of mailbox address of the domain as described in RFC1035 section 8. The string consists of printable characters from the 7-bit ASCII repertoire. DOMAIN NAME COMPRESSION AND CANONICALISATION
The Net::DNS::Mailbox1035 and Net::DNS::Mailbox2535 subclass packages implement RFC1035 domain name compression and RFC2535 canonicalisation. COPYRIGHT
Copyright (c)2009,2010 Dick Franks. All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
perl, Net::DNS, Net::DNS::DomainName, RFC822, RFC1035, RFC5322 perl v5.16.2 2012-01-27 Net::DNS::Mailbox(3)
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