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AKPOP3D(8)		    System Manager's Manual		    AKPOP3D(8)

NAME
       akpop3d -- small	and secure POP3	daemon

SYNOPSIS
       akpop3d	[-s]  [-p  port]  [-d] [-f pidfile] [-c	certfile] [-k keyfile]
	       [-l address] [-a	authfile] [-m  spooldir]  [-D]	[-L  mboxfile]
	       [-t timeout] [-x	tmpdir]	[-v] [-h]

DESCRIPTION
       akpop3d	is  a  small  and secure implementation	of a server for	as de-
       scribed in RFC1939. Furthermore,	POP3-over-SSL for secure retrieval  of
       email is	also supported.

       akpop3d	must  be  started  as root. It then listens for	connections on
       port 110. When the commandline switch -s	is used, POP3-over-SSL is  en-
       abled, and akpop3d listens on port 995.

       akpop3d	is  usually started via	some kind of startup script, which de-
       pends on	your Unix system. Init scripts for Debian and Red Hat  systems
       are provided with the source package.

OPTIONS
       akpop3d accepts the following commandline switches:

       -d      Run as a	daemon (in the background). The	process	ID of the dae-
	       mon   is	  written   to	 a  PID	 file,	which  by  default  is
	       /var/run/akpop3d.pid but	which can be changed using the -f  op-
	       tion.

       -f pidfile
	       Store  the  process  ID	of the daemon in pidfile which must be
	       specified as a full path	(i.e.  /path/to/something  instead  of
	       something on its	own).

       -s      SSL mode: instead of listening on port 110, akpop3d will	listen
	       on  port	 995  and  will	use SSL	to encrypt communications. The
	       certificate and key will	be  taken  from	 /etc/akpop3d/cert.pem
	       and  /etc/akpop3d/key.pem  respectively	unless set with	the -c
	       and -k options.

       -c certfile
	       Use certfile for	the SSL	certificate. (Point this to  your  SSL
	       certificate.)

       -k keyfile
	       Use keyfile for the SSL key. (Point this	to your	RSA key.)

       -p port
	       Listen on the given port	instead	of port	995 (SSL) or 110 (non-
	       SSL).

       -l address
	       Listen  on  the	given address instead of not binding to	a spe-
	       cific IP	address.

       -a authfile
	       Instead of using	/etc/passwd for	authentication,	read  informa-
	       tion  from  the	authfile text file. The	format of this file is
	       username:password:unixname:maildrop  (one  record  per	line),
	       where username is the POP3 username, password is	the POP3 pass-
	       word,  unixname is the Unix username to run as when reading the
	       mailbox,	and maildrop is	the full path to the maildrop file  to
	       use  for	 that  user. Note that as with the -f option, authfile
	       must be specified as a full path.

	       The password may	be given either	as an MD5 hash or in the clear
	       (not recommended).  If MD5 us used, the value should be	"MD5-"
	       followed	by 32 hexadecimal digits (lower	case) representing the
	       MD5  output  of the following string: The password, a line feed
	       (ASCII 10), the user name, a line feed, and  the	 magic	string
	       "akpop3d".   No	trailing line feed after the magic string.  As
	       an  example,  the  password  "foo"  for	user  "bar"  would  be
	       "MD5-a199706d2b8302a086a20fe9fb4e8403".

	       If  the	programs  printf  and md5sum are available, which they
	       typically are on	GNU-based systems, the hash may	be  calculated
	       using the following command:

		   printf "foo\nbar\nakpop3d" |	md5sum

       -m spooldir
	       specifies  an  alternative mail spool directory.	The default is
	       /var/mail/.

       -D      enables using the files /etc/pop3.allow and /etc/pop3.deny  for
	       specifying users	that are allowed to receive email via POP3.

       -L mboxfile
	       uses  the  file	mboxfile in the	user's home directory as mail-
	       spool.

       -t timeout
	       sets a timeout of timeout seconds for  read  and	 write	opera-
	       tions. The default is 30	seconds.

       -x tmpdir
	       set the default temporary directory to tmpdir.

       -v      Show the	program	version	and exit.

       -h      Show a summary of program options and exit.

SEE ALSO
       popa3d(8)

       RFC 1939	- Post Office Protocol - Version 3.

HISTORY
       The  current  POP3  protocol standard was published in May 1996.	It was
       preceded	by POP2	(February 1985)	and POP	(October 1984).

AUTHORS
       Andreas Krennmair <ak@synflood.at>

       Andrew Wood <andrew.wood@ivarch.com>

akpop3d				 April 4, 2003			    AKPOP3D(8)

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