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pop3d(8)


NAME

  pop3d - POP3 server


SYNOPSIS

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


OPTIONS

  -d  Sets the socket to debugging and turns on debugging.  All debugging
      information is saved using syslogd.

  -s  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.

  -t trace-file
      Turns on debugging and saves the trace information in trace-file using
      the fprintf(3) command.

  -T timeout
      When the server is waiting for a command to arrive from the client, it
      times out after the specified 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: Services
  manual 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 information.

  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.berkeley.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

  /usr/spool/mail
      mail files

  /etc/inetd.conf
      POP program invocation

  /var/adm/syslog.dated/date/mail.log
      mail logging file


SEE ALSO

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

  Network Administration: Services

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