pop2d8

Usage

Overview

Pop2d is a mailbox server based on the Internet RFC937, Post Office Protocol Version 2. 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.

Pop2d listens for TCP requests on port 109. Once connected it expects single line commands terminated by a <CR-LF>.

Pop2d currently supports the following POP2 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
HELO specify maildrop user and password
FOLD open a UNIX maildrop (FromSPACE delimited)
HOST open a BSMTP maildrop in /var/spool/pop
READ switch to a message in a maildrop
RETR retrieve a message in a maildrop
ACKS save message just retrieved, switch to next
ACKD delete message just retrieved, switch to next
NACK save message just retrieved, prepare to resend
QUIT terminate session

Files

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

Notes

The POP2 standard has been superseded by Post Office Protocol Version 3 (POP3), described in RFC1081.