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        This document describes how to setup PigeonDeliver
	to handle IMAP and POP3 connections.
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      As you probably may already know, PigeonDeliver was born
      as a modulare system able to easily handle and manage clustered
      mail solutions.
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      While the main role of a mail server is usually to deliver
      emails, any modern mailing system also offers POP3 and IMAP
      access to its own users.
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      Whenever you have a PigeonAir based server and you need to offer
      POP3 and IMAP services, you have two choices:
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{}install any imap/pop3 server you may like, like dovecot,
	  cucipop, qpopper, or courier, and simply configure it (one
	  way or another) to access the "same database", the same
	  directory structure, and the same mailbox format as 
	  PigeonAir.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
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{}use PigeonAir facilities to have a complete mailing system,
	  with all the features integrated and an uniform interface
	  to access all resources.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}
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      The first choice is what usually happens with any other MTA software:
      you install the MTA, decide the directory structure for users' home
      directories, decide a common mailbox format and figure out, one way
      or another, how to make the choosen pop3/imap server access that
      user database, directory structure and mailbox format.
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      The main disadvantage of this approach is that you often need to
      figure out how to make a given MTA with a well defined structure
      work well with a pop3/imap server with a completely different
      structure in mind. The main problems that are usually encountered
      are due to:
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{}Since most servers use either proprietary configuration files
	  or databases, to make two different softwares work together you
	  will probably end up using a shared database. While this is
	  not bad by itself and even be something you were wishing, there
	  are at least two drawbacks...\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
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{}... first of all, your choice of database to use is limited
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{}... additionally, you need to figure out how two different
	  softwares, which may use a completely different internal
	  structure, can use one same database for their purposes.
	  Usually, when configuring such a solution, problems like:
	  "hey, the mta wants the full path of the home directory
	  in one field...", "the pop3/imap server builds the path
	  using two different fields...", "the uid / gid of the
	  MTA is set from the configuration file...", "the pop3 / imap
	  server wants two fields to be added...", "one crypts
	  the passwords with ...", "the other wants..." and so
	  on. Figuring out how to make things work smoothly in such
	  conditions is not often easy, and usually leads to a
	  database more complex than necessary and with weird 
	  relations/fields to be kept consistent/... to be used.
	  Which means: something harder to maintain, and something
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{}... even if you get a nice looking database without
	  using hacks or SQL queries like CONCAT(field1, 
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	  just make different assumptions. Who creates the
	  users' home directory? is that directory writeable
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{}How do we handle privileges of different softwares
	  having to access the same user base? What if some
	  day or another you want to switch to a different
	  software? What if the two softwares have slightly
	  different semantics for things that should be
	  standard? How do we handle quotas? ...\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
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{}\LineField%
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{}How do we manage a cluster? how do we create one?
	  how do we solve concurrency issues on a database
	  that one software does not even lock when modifying
	  it, or where relations are so weird that we cannot
	  guarantee atomicity when updating user configurations...
	  (and believe me or not, there are very few open
	  source solutions that worry about the atomicity
	  of updating user configurations).\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}
    \endPar{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\Node%
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{1}}1.2. \Node%
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{title-sosofo-mode}}The PigeonAir solution...\endNode{}\endPar{}\endSeq{}\Node%
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{44}}\endNode{}\Node%
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{45}}\Par%
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{0\p@}\def\FirstLineStartIndentFactor%
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{1}}
        PigeonAir and PigeonDeliver internally provide
	support for using a couple of POP3 and IMAP
	servers.
      \endPar{}\endNode{}\Node%
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{46}}\Par%
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{1}}
        At time of writing, support for the Courier IMAP and 
	Courirer POP3 server (\Node%
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{}http://www.courier-\/mta.org\endSeq{}\endNode{})
	has already been completed, while Dovecot support is
	on its way to completion.
      \endPar{}\endNode{}\Node%
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{48}}\Par%
{\def\FirstLineStartIndent%
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{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
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{1}}
        The basic idea is quite simple: PigeonDeliver and
	PigeonAir must take care of handling all integration
	issues between the MTA and the POP3/IMAP server 
	being used (user database, authentication, directory 
	structure, mailbox format) and must take care to
	abstract out clusters of mail servers like if they
	were a single machine both to the end user, to 
	the administrator, and to the softwares being used.
      \endPar{}\endNode{}\Node%
{\def\Element%
{49}}\Par%
{\def\FirstLineStartIndent%
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{1}\def\saNom%
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{1}}
        From a more technical point of view, the idea is quite
	simple: PigeonDeliver internally implements a "modular"
	IMAP/POP3 proxy server. The proxy server itself takes
	care of authenticating users and fetching their configuration
	from a database, while its modular nature allows it to
	either transparently redirect the connections to other
	machines in a mail cluster or to \Node%
{\def\Element%
{50}}\Seq%
{\def\fPosture%
{italic}}internally
	call and load\endSeq{}\endNode{} the mail server of your choice
	(courier or dovecot, at time of writing, Fri Feb 24 
	21:30:06 CET 2006), without any performance loss (and
	probably, with some gain). What's new about the 
	PigeonDeliver IMAP/POP3 proxy modular structure is:
	\Node%
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{1}}\Node%
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{}authentication and fetching of users configurations are
	    performed only \Node%
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{54}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{\def\fPosture%
{italic}}once\endSeq{}\endNode{}. Almost
	    all IMAP/POP3 proxy we are aware of need to perform authentication
	    twice: one on the machine the user connects to, and one on 
	    the machine where the user is redirected. And, on both 
	    machines, user configurations need to be fetched from
	    the database.\endSeq{}\endNode{}\endPar{}\Node%
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{55}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
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{1.25\p@}\def\saMax%
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{1}}
	    The PigeonDeliver POP3/IMAP proxy can use a configurable
	    authentication mechanism when talking to its own peers.
	    One of these mechanisms (which is just one which you can
	    choose among others...) establishes some kind of trust 
	    path based on cryptographic authentication of hosts.
	    Once the host is authenticated, the IMAP/POP3 proxy
	    can pass authentication data (is the user who claims
	    to be? who is he?) and configurations directly to the
	    other peer, avoiding any additional lookup. No 
	    sensitive data (like passwords, certificates or private
	    keys) is ever sent on the network, not even on encrypted
	    channels.
	  \endPar{}\endNode{}\endDisplayGroup{}\endNode{}\Node%
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{56}}\DisplayGroup%
{\def\StartIndent%
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{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
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{medium}\def\fSize%
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{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
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{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
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{}when proxying is avoidable, \Node%
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{58}\def\ProcessingMode%
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{\def\fPosture%
{italic}}proxying is actually avoided\endSeq{}\endNode{}.
	    At time of writing, the PigeonDeliver IMAP/POP3 proxy can be used
	    just as a simple IMAP/POP3 authentication module. For example,
	    the "courier-\/imapd" module allows PigeonDeliver to internally
	    load the courier imapd daemon. When courier is loaded internally,
	    however, authentication has been carried on already by PigeonDeliver
	    and all user configurations have already been fetched from the
	    database. So, no need to enable strange courier authentication
	    modules, no need at all to configure any courier 
	    authentication or database. Everything is taken care efficiently
	    by the PigeonDeliver module, which also caches connections to
	    the database as much as possible. In short: by using PigeonDeliver
	    IMAP/POP3 proxy you should see a speedup in user authentications.
	    Both on single setup and on clustered solutions.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
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{59}}\DisplayGroup%
{\def\StartIndent%
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{0}}\Par%
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{-10\p@}\def\FirstLineStartIndentFactor%
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{medium}\def\fSize%
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{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
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{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
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{}If you start with one single machine, PigeonDeliver IMAP/POP3
	    proxy will just act as a very simple authentication module
	    for your IMAP/POP3 server of choice, without adding any
	    overhead to the standard mechanism used by Courier/Dovecot.\endSeq{}\endNode{}\endPar{}\Node%
{\def\Element%
{61}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
	    If you then switch to a mail cluster, PigeonDeliver IMAP/POP3
	    proxy will simply continue to handle "local connections" like
	    before, by internally loading Courier or Dovecot, while redirecting
	    connections that need to be handled by remote servers, thus
	    becoming a very fast, smart and efficient POP3/IMAP proxy.
	  \endPar{}\endNode{}\endDisplayGroup{}\endNode{}\Node%
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{\def\StartIndent%
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{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
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{medium}\def\fSize%
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{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
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{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
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{}This same modular structure also allows for many other
	    mechanisms to be used. If you want a "normal and standard"
	    IMAP/POP3 proxy, you can use the PigeonDeliver one just
	    to avoid having to mess up with the database one more time.
	    Right, because if you have a MTA, a POP3/IMAP server,
	    an IMAP/POP3 proxy based on different softwares, it is quite
	    easy to end up with a good headache when configuring one single
	    database to be used by all of them.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{64}}\DisplayGroup%
{\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
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{medium}\def\fSize%
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{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
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{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
{\def\Element%
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{}Another nice feature is that it can really be \Node%
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{66}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{\def\fPosture%
{italic}}integrated\endSeq{}\endNode{} 
	    in any mail server.
	    As an example, if you use the module "pd-\/forker-\/inet" you can run
	    the IMAP/POP3 server from your inetd.conf file. If you use "pd-\/forker-\/stdio",
	    you can load it from the command line. If you use "pd-\/forker-\/postfix",
	    you can run it from the "master.cf" postfix configuration file, ending 
	    up with a single place for your logs and with all daemons involved 
	    with "mail management" monitored by the postfix master, which is extremely
	    reliable and performant, and which should simplify the task of administering
	    the machine. If you use "pd-\/forker-\/listen", you will be able to run the 
	    IMAP/POP3 server as a standalone daemon... and you are free to add more 
	    modules to support more advanced connection handling/forking mechanisms 
	    or to integrate PigeonDeliver IMAP/POP3 server in any other software 
	    you may like.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}
      \endPar{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\Node%
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{67}}\DisplayGroup%
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{1}\def\saNom%
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{}\Seq%
{}\Par%
{\def\fFamName{Arial}\def\fWeight%
{bold}\def\fPosture%
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{17.28\p@}\def\LineSpacing%
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{0}\def\StartIndent%
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{0}\def\FirstLineStartIndent%
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{0}\def\Quadding%
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{2}\def\sbNom%
{12.96\p@}\def\sbMin%
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{3.456\p@}\def\saMin%
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{1}\def\KeepWithNext%
{1}}2. \Node%
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{68}\def\ProcessingMode%
{title-sosofo-mode}}Using the PigeonDeliver IMAP/POP3 support\endNode{}\endPar{}\endSeq{}\Node%
{\def\Element%
{68}}\endNode{}\Node%
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{69}}\Par%
{\def\FirstLineStartIndent%
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      Using the PigeonDeliver IMAP/POP3 support is quite easy.
      You need to:
      \Node%
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{1}}\Node%
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{}configure PigeonDeliver with support:
	  \Node%
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{}for the POP3/IMAP authentication handling features
	      (login-\/imap, login-\/pop3).\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
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{\def\Element%
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{}for the POP3/IMAP handler to be run from the mail server 
	      of your choice, or using
	      the specified mechanism (forker-\/postfix, forker-\/stdio,
	      forker-\/daemon, forker-\/inetd, ...). For example, if you
	      use forker-\/postfix you will be able to add your new
	      IMAP/POP3 server in your postfix "master.cf" 
	      configuration file, and leave the postfix "master" the
	      duty of making sure it will alwaays work. If you
	      compile the forker-\/daemon module, you will be able
	      to run the POP3/IMAP server  as a standalone daemon, ...\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{78}\def\ProcessingMode%
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{\def\StartIndent%
{68\p@}\def\StartIndentFactor%
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{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
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{medium}\def\fSize%
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{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
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{79}\def\ProcessingMode%
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{}for the IMAP/POP3 server that will be used. More than
	      one server can be supported at the same time, even if,
	      at time of writing, only one at a time can be used.
	      In future versions of PigeonDeliver this limit may
	      be as well removed.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{80}}\DisplayGroup%
{\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
{0}\def\fFamName{Times-New-Roman}\def\fWeight%
{medium}\def\fSize%
{10\p@}\def\sbNom%
{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
{8\p@}\def\PositionPointShift%
{0\p@}\def\PositionPointShiftFactor%
{0}\def\FieldWidth%
{10\p@}\def\FieldWidthFactor%
{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
{\def\Element%
{81}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{}enable the POP3/IMAP handler.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}
    \endPar{}\endNode{}\Node%
{\def\Element%
{82}}\DisplayGroup%
{\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}\Seq%
{}\Seq%
{}\Par%
{\def\fFamName{Arial}\def\fWeight%
{bold}\def\fPosture%
{upright}\def\fSize%
{14.4\p@}\def\LineSpacing%
{18.72\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\HeadingLevel%
{3}\def\sbNom%
{10.8\p@}\def\sbMin%
{10.8\p@}\def\sbMax%
{10.8\p@}\def\sbConditional%
{1}\def\saNom%
{2.88\p@}\def\saMin%
{2.88\p@}\def\saMax%
{2.88\p@}\def\saConditional%
{1}\def\KeepWithNext%
{1}}2.1. \Node%
{\def\Element%
{83}\def\ProcessingMode%
{title-sosofo-mode}}Configuring PigoenDeliver with IMAP/POP3 support\endNode{}\endPar{}\endSeq{}\Node%
{\def\Element%
{83}}\endNode{}\Node%
{\def\Element%
{84}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        Well, this step should be quite easy:
\Node%
{\def\Element%
{85}}\Par%
{\def\fSize%
{9\p@}\def\LineSpacing%
{11.7\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\fFamName{Courier-New}\def\fWeight%
{medium}\def\fPosture%
{upright}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Lines%
{asis}\def\InputWhitespaceTreatment%
{preserve}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}
\$ mkdir build.imap
\$ mkdir build.pop3
\$ cd build.pop3
\$ sh ../examples/configure/configure.*.pop3
\$ cd .. 
\$ cd build.imap
\$ sh ../examples/configure/configure.*.imap
\endPar{}\endNode{}
	then, you can simply "make" and "make install" as usual. Instead
	of configure.*.pop3 and configure.*.imap, you must choose one
	of the available examples. For example, I may chose to use 
	configure.linux.postfix.imap and configure.linux.postfix.pop3.
	If you want to, you can open those files and modify them to better
	suit your own needs. Keep also in mind that this process
	involves "some duplication", which means that some libraries 
	needed both by pop3 and imap are compiled twice.
      \endPar{}\endNode{}\Node%
{\def\Element%
{86}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        If you want to avoid the duplication, you can just take a look
	to the two files (configure.*.pop3, and configure.*.imap), and run
	one "../configure" instead of "sh ../examples[...]" with the parameters
	of both the files.
      \endPar{}\endNode{}\Node%
{\def\Element%
{87}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        Keep also in mind that, at time of writing, 
	Fri Feb 24 22:19:16 CET 2006, those two files will compile all 
	the "forkers modules" available, which means: forker-\/stdio and 
	forker-\/listen. In other words, you will be able to run the 
	POP3/IMAP server both from the command line (forker-\/stdio), as
	a simple standalone daemon (forker-\/listen) and from the postfix
	master.cf file (forker-\/postfix). Keep also in mind that both
	the support for courier and dovecot will be compiled.
      \endPar{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{88}}\DisplayGroup%
{\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}\Seq%
{}\Seq%
{}\Par%
{\def\fFamName{Arial}\def\fWeight%
{bold}\def\fPosture%
{upright}\def\fSize%
{14.4\p@}\def\LineSpacing%
{18.72\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\HeadingLevel%
{3}\def\sbNom%
{10.8\p@}\def\sbMin%
{10.8\p@}\def\sbMax%
{10.8\p@}\def\sbConditional%
{1}\def\saNom%
{2.88\p@}\def\saMin%
{2.88\p@}\def\saMax%
{2.88\p@}\def\saConditional%
{1}\def\KeepWithNext%
{1}}2.2. \Node%
{\def\Element%
{89}\def\ProcessingMode%
{title-sosofo-mode}}Configuring postfix to run the IMAP/POP3 service\endNode{}\endPar{}\endSeq{}\Node%
{\def\Element%
{89}}\endNode{}\Node%
{\def\Element%
{90}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        If you compiled the "forker-\/postfix" module or you used the
	configure.*.postfix.imap or configure.*.postfix.pop3 examples,
	you can run the POP3/IMAP proxy directly from the master.cf
	configuration file.
      \endPar{}\endNode{}\Node%
{\def\Element%
{91}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        You just need to add the lines:
\Node%
{\def\Element%
{92}}\Par%
{\def\fSize%
{9\p@}\def\LineSpacing%
{11.7\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\fFamName{Courier-New}\def\fWeight%
{medium}\def\fPosture%
{upright}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Lines%
{asis}\def\InputWhitespaceTreatment%
{preserve}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}
imap inet  n n n -\/ -\/ pd-\/forker-\/postfix -\/odscm\char95{}service=login-\/imap
pop3 inet  n n n -\/ -\/ pd-\/forker-\/postfix -\/odscm\char95{}service=login-\/pop3
\endPar{}\endNode{}
  	and to restart postfix, with something like:
\Node%
{\def\Element%
{93}}\Par%
{\def\fSize%
{9\p@}\def\LineSpacing%
{11.7\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\fFamName{Courier-New}\def\fWeight%
{medium}\def\fPosture%
{upright}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Lines%
{asis}\def\InputWhitespaceTreatment%
{preserve}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}
\# postfix stop
\# postfix start
\endPar{}\endNode{}
	or
\Node%
{\def\Element%
{94}}\Par%
{\def\fSize%
{9\p@}\def\LineSpacing%
{11.7\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\fFamName{Courier-New}\def\fWeight%
{medium}\def\fPosture%
{upright}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Lines%
{asis}\def\InputWhitespaceTreatment%
{preserve}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}
\# /etc/init.d/postfix restart
\endPar{}\endNode{}
      \endPar{}\endNode{}\Node%
{\def\Element%
{95}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        Just a few notes about the IMAP/POP3 service security:
	both services run at fixed low privileges, as much as
	most of the other postfix daemons. If they are only
	proxying connections, you don't need to make them
	privileged and you don't need to make them run 
	outside of your chroot, so, you can change the above
	lines in something like:
\Node%
{\def\Element%
{96}}\Par%
{\def\fSize%
{9\p@}\def\LineSpacing%
{11.7\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\fFamName{Courier-New}\def\fWeight%
{medium}\def\fPosture%
{upright}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Lines%
{asis}\def\InputWhitespaceTreatment%
{preserve}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}
imap inet  n -\/ -\/ -\/ -\/ pd-\/forker-\/postfix -\/odscm\char95{}service=login-\/imap
pop3 inet  n -\/ -\/ -\/ -\/ pd-\/forker-\/postfix -\/odscm\char95{}service=login-\/pop3
\endPar{}\endNode{}
	Those privileges are needed because:
	\Node%
{\def\Element%
{97}}\DisplayGroup%
{\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\saNom%
{5\p@}\def\saMin%
{5\p@}\def\saMax%
{5\p@}\def\saConditional%
{1}}\Node%
{\def\Element%
{98}}\DisplayGroup%
{\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
{0}\def\fFamName{Times-New-Roman}\def\fWeight%
{medium}\def\fSize%
{10\p@}\def\sbNom%
{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
{8\p@}\def\PositionPointShift%
{0\p@}\def\PositionPointShiftFactor%
{0}\def\FieldWidth%
{10\p@}\def\FieldWidthFactor%
{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
{\def\Element%
{99}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{}the daemon needs to access users home directories.
	    Users home directories usually are not stored in
	    the chroot, and they better not to be.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{100}}\DisplayGroup%
{\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
{0}\def\fFamName{Times-New-Roman}\def\fWeight%
{medium}\def\fSize%
{10\p@}\def\sbNom%
{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
{8\p@}\def\PositionPointShift%
{0\p@}\def\PositionPointShiftFactor%
{0}\def\FieldWidth%
{10\p@}\def\FieldWidthFactor%
{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
{\def\Element%
{101}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{}the daemon eventually needs to create the home
	    directory of the users. If you want to, and you
	    set up group privileges correctly, you can set it
	    up as an unprivileged component of postfix, with
	    something like:
\Node%
{\def\Element%
{102}\def\ProcessingMode%
{listitem-content-mode}}\Par%
{\def\fSize%
{9\p@}\def\LineSpacing%
{11.7\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}\def\fFamName{Courier-New}\def\fWeight%
{medium}\def\fPosture%
{upright}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Lines%
{asis}\def\InputWhitespaceTreatment%
{preserve}\def\sbNom%
{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}
imap inet  n y n -\/ -\/ pd-\/forker-\/postfix -\/odscm\char95{}service=login-\/imap
pop3 inet  n y n -\/ -\/ pd-\/forker-\/postfix -\/odscm\char95{}service=login-\/pop3
\endPar{}\endNode{}\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}
	\endPar{}\endNode{}\Node%
{\def\Element%
{103}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
	Note, however, that the real imap/pop3 daemon (courier/dovecot)
	are run with \Node%
{\def\Element%
{104}}\Seq%
{\def\fPosture%
{italic}}fixed low privileges\endSeq{}\endNode{}, exactly
	the same privileges that would be given directly to the user
	(or that you have configured with the MDA module). The security
	model is something like: 
	\Node%
{\def\Element%
{105}}\DisplayGroup%
{\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\saNom%
{5\p@}\def\saMin%
{5\p@}\def\saMax%
{5\p@}\def\saConditional%
{1}}\Node%
{\def\Element%
{106}}\DisplayGroup%
{\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
{0}\def\fFamName{Times-New-Roman}\def\fWeight%
{medium}\def\fSize%
{10\p@}\def\sbNom%
{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
{8\p@}\def\PositionPointShift%
{0\p@}\def\PositionPointShiftFactor%
{0}\def\FieldWidth%
{10\p@}\def\FieldWidthFactor%
{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
{\def\Element%
{107}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{}very small login/authenticator process, wich runs with
	    low privileges, but able to gain additional privileges
	    to create user home directories.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{108}}\DisplayGroup%
{\def\StartIndent%
{58\p@}\def\StartIndentFactor%
{0}}\Par%
{\def\FirstLineStartIndent%
{-10\p@}\def\FirstLineStartIndentFactor%
{0}\def\fFamName{Times-New-Roman}\def\fWeight%
{medium}\def\fSize%
{10\p@}\def\sbNom%
{5\p@}\def\sbMin%
{5\p@}\def\sbMax%
{5\p@}\def\sbConditional%
{1}}\Seq%
{}\LineField%
{\def\fSize%
{8\p@}\def\PositionPointShift%
{0\p@}\def\PositionPointShiftFactor%
{0}\def\FieldWidth%
{10\p@}\def\FieldWidthFactor%
{0}}\Character{8226}\endLineField{}\endSeq{}\Node%
{\def\Element%
{109}\def\ProcessingMode%
{listitem-content-mode}}\Seq%
{}child process, which runs with fixed low privileges,
	    able to really make the IMAP/POP3 services available.\endSeq{}\endNode{}\endPar{}\endDisplayGroup{}\endNode{}\endDisplayGroup{}\endNode{}
	In future releases of PigeonDeliver, the login/authenticator
	process will probably become an even simpler process using
	an authenticator module, which can then use an independent
	daemon for user authentication.
      \endPar{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\Node%
{\def\Element%
{110}}\DisplayGroup%
{\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\sbNom%
{10\p@}\def\sbMin%
{10\p@}\def\sbMax%
{10\p@}\def\sbConditional%
{1}\def\saNom%
{10\p@}\def\saMin%
{10\p@}\def\saMax%
{10\p@}\def\saConditional%
{1}}\Seq%
{}\Seq%
{}\Par%
{\def\fFamName{Arial}\def\fWeight%
{bold}\def\fPosture%
{upright}\def\fSize%
{14.4\p@}\def\LineSpacing%
{18.72\p@}\def\LineSpacingFactor%
{0}\def\StartIndent%
{48\p@}\def\StartIndentFactor%
{0}\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\HeadingLevel%
{3}\def\sbNom%
{10.8\p@}\def\sbMin%
{10.8\p@}\def\sbMax%
{10.8\p@}\def\sbConditional%
{1}\def\saNom%
{2.88\p@}\def\saMin%
{2.88\p@}\def\saMax%
{2.88\p@}\def\saConditional%
{1}\def\KeepWithNext%
{1}}2.3. \Node%
{\def\Element%
{111}\def\ProcessingMode%
{title-sosofo-mode}}Configuring the POP3/IMAP service\endNode{}\endPar{}\endSeq{}\Node%
{\def\Element%
{111}}\endNode{}\Node%
{\def\Element%
{112}}\Par%
{\def\FirstLineStartIndent%
{0\p@}\def\FirstLineStartIndentFactor%
{0}\def\Quadding%
{start}\def\Hyphenate%
{0}\def\Language%
{EN}\def\sbNom%
{20\p@}\def\sbMin%
{20\p@}\def\sbMax%
{20\p@}\def\sbConditional%
{1}\def\saNom%
{1.25\p@}\def\saMin%
{1.25\p@}\def\saMax%
{1.25\p@}\def\saConditional%
{1}}
        Once you correctly installed the PigeonAir POP3/IMAP service,
	you \Node%
{\def\Element%
{113}}\Seq%
{\def\fPosture%
{italic}}don't have to do anything else\endSeq{}\endNode{} to
	configure them. If you correctly set up mail delivery for 
	PigeonDeliver those services will automatically use the
	configuration you already provied when configuring
	mail delivery: the correct MDA will be called to access
	the directory structure, the same users creation 
	procedures will be used the first time a new user logs
	in, and the same database driver with the same parameters
	will be loaded.
      \endPar{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\endSeq{}\endDisplayGroup{}\endNode{}\endSpS{}\endSeq{}\endNode{}\endNode{}\endSeq{}\endFOT{}