pop3d - POP3 server
/usr/sbin/pop3d [-d] [-s] [-t trace-file] [-T timeout]
Sets the socket to debugging and turns on debugging. All
debugging information is saved using syslogd. 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. Turns on debugging and saves the trace information
in trace-file using the fprintf(3) command. 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.
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 [Toc] [Back]
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 [Toc] [Back]
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 [Toc] [Back]
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 [Toc] [Back]
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.
Note that this implementation of Qualcomm's POP3 server
does not support Server Mode, Kerberos authentication, or
the bulletin feature.
mail files POP program invocation mail logging file
Commands: inetd(8), mailauth(8), mailusradm(8), secconfig(8)
Network Administration: Services
pop3d(8)
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