pop3d(8)						      System Manager's Manual							  pop3d(8)

NAME

       pop3d - POP3 server

SYNOPSIS

       /usr/sbin/pop3d [-d] [-s] [-t trace-file] [-T timeout]

OPTIONS

       Sets  the socket to debugging and turns on debugging.  All debugging information is saved using syslogd.  Turns on statistics logging using
       syslogd(8). At the end of each pop3d session, the following information is logged: username, number of messages deleted,  number  of  bytes
       deleted,  number  of  message  left  on	server,  number  of  bytes  left on server.  Turns on debugging and saves the trace information in
       trace-file using the fprintf(3) command.  When the server is waiting for a command to arrive from the client, it times out after the speci-
       fied  number of seconds and terminates the session.  This avoids having pop3d processes hang forever waiting for command input from clients
       which have terminated abnormally. A small value is acceptable for small to medium networks where the network delay is within a few seconds.
       In  this  case  15-30  seconds  is not unreasonable.  Networks with large delays in sending packets (for example, SLIP links) may require a
       larger value.  In this case 300 seconds (5 minutes) is not unreasonable.

DESCRIPTION

       The pop3d server is an implementation of the Post Office Protocol Version 3 from Qualcomm, Incorporated. It provides remote users with  the
       ability to manage electronic mail on a UNIX system.

   Authentication
       The  operating  system supports the following types of authentication for the pop3d server: UNIX authentication using the /etc/passwd file,
       Authenticated POP (APOP), and enhanced security using C2. The default is UNIX authentication.

       To enable APOP authentication for a user, you must add the user to the mailauth database. See mailauth(8) and  the  Network  Administration
       guide for more information.

       To use C2 secure authentication, you must configure your system to use C2 security. See secconfig(8) and the Security guide for more infor-
       mation.

   Logging
       The pop3d server uses the syslog daemon to keep a record of its activities.  Messages are logged in the /var/adm/syslog.dated/date/mail.log
       file.

   Debugging
       The  pop3d  program  will  log  debugging information when the -d parameter is specified after its invocation in the inetd.conf file.  Care
       should be exercised in using this option since it generates considerable output in the mail.log	file.	Alternatively,	the  -t  file-name
       option will place debugging information into file file-name using fprintf instead of syslog.

       You  can  confirm  that	the  POP server is running by opening a telnet session to port 110.  For example: % telnet myhost 110 Connected to
       myhost.berkeley.edu.  Escape character is '^]'.	+OK UCB Pop server (version 1.6) at myhost starting.  quit +OK Pop server at myhost.berke-
       ley.edu signing off.  Connection closed by foreign host.

   Extensions
       The server implements two extended commands: XTND XMIT

	      Sends a mail message using /usr/sbin/sendmail.  XTND XLIST header [num]

	      Extracts	and  returns  the  specified  header  line  for the specified message number. If the num parameter is missing, the command
	      returns the header line for all the messages that are not currently marked for deletion.

RESTRICTIONS

       Note that this implementation of Qualcomm's POP3 server does not support Server Mode, Kerberos authentication, or the bulletin feature.

FILES

       mail files POP program invocation mail logging file

SEE ALSO

       Commands: inetd(8), mailauth(8), mailusradm(8), secconfig(8)

       Network Administration

																	  pop3d(8)