pop3d Daemon

Purpose

Starts the Post Office Protocol Version 3 (POP3) server process.

Syntax

pop3d [-c]

Description

The pop3d command is a POP3 server. It supports the POP3 remote mail access protocol. Also, it accepts commands on its standard input and responds on its standard output. You normally invoke the pop3d command with the inetd daemon with those descriptors attached to a remote client connection.

The pop3d command works with the existing mail infrastructure consisting of sendmail and bellmail.

Flags

Item	Description
-c	Suppresses the reverse host name lookup.

Parameters

Item	Description
None

Exit Status

All error and status information is written to a logfile if syslogd is configured for logging.

Security

The pop3d daemon is a PAM-enabled application with a service name of imap. System-wide configuration to use PAM for authentication is set by modifying the value of the auth_type attribute, in the usw stanza of /etc/security/login.cfg, to PAM_AUTH as the root user.

The authentication mechanisms used when PAM is enabled depend on the configuration for the imap service in /etc/pam.conf. The pop3d daemon requires /etc/pam.conf entries for the auth and session module types. Listed below is a recommended configuration in /etc/pam.conf for the imap service:

#
# AIX imap configuration
#
imap auth      required     /usr/lib/security/pam_aix

imap session   required     /usr/lib/security/pam_aix

Note: Because the pop3d daemon uses the imap library for authentication, the imap service is used for both the imapd and pop3d daemons.

Files

Item	Description
/usr/sbin/pop3d	Contains the pop3d command.
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