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2d2fac9 @purcell Add a tiny readme
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1 Postfix Policy Daemon using whois data
2 ======================================
3
4 This simple [postfix policy daemon](http://www.postfix.org/SMTPD_POLICY_README.html) rejects
5 emails sent from domains registered without publicly-accessible contact information, since
7aed07b @purcell Mention blocking of mail from ADDPERIOD and pending expiry domains
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6 those domains are often owned by spammers. Some mail server administrators might consider this
7 too draconian for their tastes.
2aad6c2 @purcell Add note about project status, and include coderwall endorse button
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8
7aed07b @purcell Mention blocking of mail from ADDPERIOD and pending expiry domains
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9 The policy daemon also rejects mail from domains which are pending expiry, or are in their initial
10 grace period after new registration ("ADDPERIOD"): sophisticated spam outfits frequently
11 register fresh domains and provision servers which send mail that passes all reasonable header checks
12
13 Rejecting mail during the sending domain's ADDPERIOD gives time for others to report abuse to the
14 hosting provider, and allows spamcop and other blocklist maintainers a chance to add that domain.
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16 *Current status: testing privately in a moderately large production environment*
2aad6c2 @purcell Add note about project status, and include coderwall endorse button
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17
18 <hr>
19
20 [![](http://api.coderwall.com/purcell/endorsecount.png)](http://coderwall.com/purcell)
21
22 [![](http://www.linkedin.com/img/webpromo/btn_liprofile_blue_80x15.png)](http://uk.linkedin.com/in/stevepurcell)
fa9cd80 @purcell Add blog/twitter links
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23
24 [Steve Purcell's blog](http://www.sanityinc.com/) // [@sanityinc on Twitter](https://twitter.com/sanityinc)
25
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