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COURIERPOP3D(8)		    Double Precision, Inc.	       COURIERPOP3D(8)

NAME
       courierpop3d - The Courier POP3 server

SYNOPSIS

       /usr/local/sbin/couriertcpd {-nodnslookup} {-stderr=syslog} {110}
				   {/usr/local/libexec/courier/courierpop3login}
				   [modules...]
				   {/usr/local/libexec/courier/courierpop3d}
				   {./Maildir}

DESCRIPTION
       This is a simple	POP3 server for	Maildirs.

	   Note

	   The couriertcpd, courierpop3login, and courierpop3d modules may be
	   installed elsewhere than indicated here.

       courierpop3login	is usually started by couriertcpd. It already expects
       that a POP3 client is connected to standard input and output,
       presumably via a	network	socket.	 courierpop3login reads	the POP3
       userid and password, then runs the authentication modules. The
       remaining arguments are passed along as arguments to modules.

       modules is one or more authentication modules (see the authlib(7)[1]
       manual page).

       Each authentication modules runs	the program specified by its first
       argument, allowing the authentication modules to	be chained. The	last
       program in the chain is courierpop3d , which provides the actual	POP3
       service.	In accordance with the authentication protocol,	as described
       in authlib(7)[1]	courierpop3d reads file	descriptor 3 to	see if the
       userid/password has been	succesfully validated. If not, courierpop3d
       terminates.

       Otherwise, courierpop3d expects to be already running under the
       appropriate user	and group id, with its current directory set to	the
       account's home directory.

       The first order of business is to find the account's Maildir. If	the
       environment variable MAILDIR is set, that's where we go.	That should be
       the pathname to the account's Maildir. The environment variable MAILDIR
       may be set by the authentication	module.	If MAILDIR is not set,
       courierpop3d uses its first argument. Usually, the default maildir is
       $HOME/Maildir, therefore	the first argument to courierpop3d is
       "./Maildir".

SEE ALSO
       authlib(7)[1], userdb(8)[2].

AUTHOR
       Sam Varshavchik
	   Author

NOTES
	1. authlib(7)
	   http://www.courier-mta.org/authlib.html

	2. userdb(8)
	   http://www.courier-mta.org/userdb.html

Courier	Mail Server		  01/19/2022		       COURIERPOP3D(8)

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