Implementing SPF on Mac OS X 10.4.x

Short Description
This tutorial has been tested on a standard Mac OS X 10.4.x. Server installation. If you have already tinkered with your. system, be aware that things might …

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Content
Implementing
SPF
on
Mac OS X 10.5.x/10.4.x
1. - Introduction
2. - Requirements
3. - Getting and installing SPF components
4. - Using Mail::SPF to verify incoming messages
5. - Setting up an SPF record
6. - Caveats - READ this chapter!
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damage that may occur from the use of any information found here
or found on links followed from this document. The author(s)
will take credit for the good stuff though.
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the respective companies or individuals.
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1. - IntroductionThe purpose of this document is to provide instructions on how
to implement SPF on OS X 10.5.x/10.4.x Server.
You will not find many explanations as to why something is done
one way or the other. Also, I will not discuss whether SPF is
useful or not. This is a decision you must make for yourself.
There are enough discussions about this available on the
internet.
SPF functionality has two sides to it. First, it is used to
verify if a sender domain is using SPF records and if the
incoming mail came from an allowed mail server. Second, it
allows you to publish your own SPF record for recipients to
verify if mail came from an authorised server.
SPF functionality depends on several Perl modules and scripts to
be installed.
Verification of the SPF record is done through amavisd-new/
SpamAssassin. This allows to integrate as closely as possible
with the existing components on OS X 10.5.x/10.4.x server. It
would be possible to check at the postfix level with a policy
server, but it is trickier to implement and if done incorrectly
can result in more spam coming in.
The SPF record on…