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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+ <herd>maintainer-wanted</herd>
+ <maintainer>
+ <email>gentoo@bitcetera.com</email>
+ <name>Sven Schwyn</name>
+ </maintainer>
+ <longdescription lang="en">
+ Postwhite is a policy server for Postfix MTA which filters incoming emails
+ based on per recipient whitelists managed by an email frontend.
+
+ Incoming emails are denied unless the sender address or sender domain is
+ present on the recipient's whitelist. This concept is neither new nor fancy
+ in itself, but the way Postwhite lets you manage your whitelist sure is.
+
+ Here is a real life example:
+
+ Arthur's main email address arthur@dent.tld is great for everyday
+ use, but he doesn't want to pollute it by using it for mailing lists,
+ websites, online shopping and such. Postwhite to the rescue! Arthur creates
+ a virtual email address hitchhike@dent.tld which is delivered to
+ the same mailbox. He adds this address to recipients.yml and then
+ restarts Postwhite.
+
+ Initially, all incoming emails will be denied, so when Arthur decides to
+ join the Betelgeuse mailing list, his whitelist has to learn about this.
+ Arthur sends an empty email to hitchhike+learn@dent.tld which
+ puts Postwhite into learning mode for a limited period of time. In learning
+ mode, Postwhite allows and delivers any incoming mails, yet it
+ delivers a followup notification message along with it. When the first
+ email from the Betelgeuse mailing list comes in, Arthur simply replies to
+ the corresponding notification message thus adding Betelgeuse to the
+ whitelist.
+ </longdescription>
+</pkgmetadata>