03-22-2013
Assuming you do not want to write one, there are many mail servers and most LINUX systems come with one installed. You need the domain's DNS records pointing to it so mail comes in, and an ISP outgoing mail server makes your life much simpler. The server needs a good matching A record for its PTR record as well as an MX.
Setting Up Mail Server Records in the DNS
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LEARN ABOUT MOJAVE
mail::spf::mech::ptr5.18
Mail::SPF::Mech::PTR(3) User Contributed Perl Documentation Mail::SPF::Mech::PTR(3)
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 v5.18.2 2017-10-06 Mail::SPF::Mech::PTR(3)