POP3D(8C)

NAME
pop3d -- remote maildrop access server

SYNOPSIS
/usr/sbin/in.pop3d [-h] [-d] [-i|-b] [-p portno]

DESCRIPTION
Pop3d is a mailbox server based on the Internet Standard STD 53, Post Office Protocol Version 3. The program allows remote access to UNIX maildrops found in /var/spool/mail. The server requires user and password verification before a maildrop can be opened. The server can retrieve and delete messages from the maildrop on a per-message basis.

The server runs in "inetd" mode by default or with the -i option and it expects to be started by some server process such as inetd. If the -b option is given, it is run as a standalone server in the background (and should NOT be listed in inetd.conf). The standalone/background mode is somewhat faster and more efficient.

The -h option prints usage and command line options.

Pop3d listens for TCP requests on port 110 or on "portno" if the -p portno option is given. Once connected it expects single line commands terminated by a <CR-LF>.

Pop3d currently supports the following POP3 commands; the commands are case independent.

    Command			Description
    USER			specify user for maildrop access
    PASS			specify password for maildrop access
    APOP			specify user and hashed password for maildrop access
    STAT			give message count and size of maildrop
    LIST			list size of individual messages
    RETR			retrieve a message
    DELE			delete a message
    NOOP			do nothing, return a positive response
    LAST			give highest message number accessed
    RSET			unmark messages marked for deletion
    TOP			retrieve part of a message
    UIDL			retrieve the unique ID for a message
    QUIT			terminate session

The remaining optional commands specified in STD 53 (RPOP) is not implemented.

FILES

/var/spool/mail/*
    UNIX FromSPACE delimited maildrops

AUTHOR
Katie Stevens, <dkstevens@ucdavis.edu>, Information Technology -- Campus Access Point University of California, Davis

NOTES
The POP3 standard supersedes Post Office Protocol Version 2 (POP2), described in RFC937.

Maintainer of one verison of this daemon is Derric Scott, <dtscott@scott.net>, Scott Network Services, Inc. The latest version can be found at ftp://ftp.scott.net/pub/linux/mail.