POP3D(8)

NAME
pop3d - remote maildrop access server

SYNOPSIS
/usr/sbin/in.pop3d

DESCRIPTION
Pop3d is a mailbox server based on the Internet RFC1225, 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. Pop3d listens for TCP requests on port 110. Once connected it expects single line commands terminated by a <CR-LF>. Pop3d currently supports the following POP3 commands; the commands are case independent. In addition, the server supports one extension command, HOST, which allows access to BSMTP formatted maildrops in the directory /var/spool/pop. The syntax for the HOST command is: HOST <hostname>
Example:    HOST fennario.ucdavis.edu
this will open the file at /var/spool/pop/fennario.ucdavis.edu
Command    Description
USER    specify user for maildrop access
PASS    specify 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
QUIT    terminate session
The remaining optional command specified in RFC1225 (RPOP) is not implemented.

FILES
/var/spool/mail/*    UNIX FromSPACE delimited maildrops
/var/spool/pop/*    BSMTP formatted maildrops

SEE ALSO
pop2d(8)

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.