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Full Discussion: TXT Records: Usage
Special Forums IP Networking TXT Records: Usage Post 302886153 by neutronscott on Wednesday 29th of January 2014 09:33:47 PM
Old 01-29-2014
TXT can hold about any text, so new things can get stuffed in there. SPF I think has a record now but still lives in TXT as well for old implementations. I've seen it also hold DKIM (another email spam thing), ssh fingerprints, DNS-SD (Service discovery), and just any plain ol' text you want. I don't recognize your example as being anything useful though, but a quick Google shows the ms=msXXXX entry seems to be for Microsoft Office 365
 

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Mail::SPF::Mech::Exists(3)				User Contributed Perl Documentation				Mail::SPF::Mech::Exists(3)

NAME
Mail::SPF::Mech::Exists - SPF record "exists" mechanism class DESCRIPTION
An object of class Mail::SPF::Mech::Exists represents an SPF record mechanism of type "exists". Constructors The following constructors are provided: new(%options): returns Mail::SPF::Mech::Exists Creates a new SPF record "exists" 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($text, %options): returns Mail::SPF::Mech::Exists; throws Mail::SPF::ENothingToParse, Mail::SPF::EInvalidMech Creates a new SPF record "exists" mechanism object by parsing the string and any options given. Class methods The following class methods are provided: default_qualifier qualifier_pattern See "Class methods" in Mail::SPF::Mech. name: returns string Returns 'exists'. name_pattern: returns Regexp Returns a regular expression that matches a mechanism name of 'exists'. Instance methods The following instance methods are provided: text qualifier params stringify See "Instance methods" in Mail::SPF::Mech. domain_spec: returns Mail::SPF::MacroString Returns the "domain-spec" parameter of the mechanism. match($server, $request): returns boolean Checks whether a DNS "A" record exists for the mechanism's target domain name, and returns true if one does, or false otherwise. See RFC 4408, 5.7, for details. 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 v5.18.2 2017-10-06 Mail::SPF::Mech::Exists(3)
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