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Top Forums UNIX for Advanced & Expert Users [DNS] Reverse Lookup for 2 IP Addresses Post 302233744 by sysgate on Monday 8th of September 2008 10:29:07 AM
Old 09-08-2008
Carl, your approach seems correct, as well as PTR section. I can't find any gotchas it first glance, I think you're ready to go, certainly, other opinions are appreciated as always.
 

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Mail::SPF::Mech::PTR(3pm)				User Contributed Perl Documentation				 Mail::SPF::Mech::PTR(3pm)

NAME
Mail::SPF::Mech::PTR - SPF record "ptr" mechanism class DESCRIPTION
An object of class Mail::SPF::Mech::PTR represents an SPF record mechanism of type "ptr". Constructors The following constructors are provided: new(%options): returns Mail::SPF::Mech::PTR Creates a new SPF record "ptr" mechanism object. %options is a list of key/value pairs representing any of the following options: qualifier domain_spec See "new" in Mail::SPF::Mech. new_from_string($text, %options): returns Mail::SPF::Mech::PTR; throws Mail::SPF::ENothingToParse, Mail::SPF::EInvalidMech Creates a new SPF record "ptr" mechanism object by parsing the string and any options given. Class methods The following class methods are provided: default_qualifier qualifier_pattern See "Class methods" in Mail::SPF::Mech. name: returns string Returns 'ptr'. name_pattern: returns Regexp Returns a regular expression that matches a mechanism name of 'ptr'. Instance methods The following instance methods are provided: text qualifier params stringify See "Instance methods" in Mail::SPF::Mech. domain_spec: returns Mail::SPF::MacroString Returns the "domain-spec" parameter of the mechanism. match($server, $request): returns boolean Checks whether the mechanism's target domain name, or a sub-domain thereof, is a "valid" domain name for the given request's IP address (see "ip_address" in Mail::SPF::Request), and returns true if it does, or false otherwise. See "valid_domain_for_ip_address" in Mail::SPF::Util for how domains are validated. See RFC 4408, 5.5, for the description of an equivalent algorithm. SEE ALSO
Mail::SPF, Mail::SPF::Record, Mail::SPF::Term, Mail::SPF::Mech <http://tools.ietf.org/html/rfc4408> For availability, support, and license information, see the README file included with Mail::SPF. AUTHORS
Julian Mehnle <julian@mehnle.net>, Shevek <cpan@anarres.org> perl v5.14.2 2012-01-30 Mail::SPF::Mech::PTR(3pm)
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