1POP3D(8)                          Cyrus IMAP                          POP3D(8)
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NAME

6       pop3d - Cyrus IMAP documentation
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8       POP3 server process
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SYNOPSIS

11          pop3d [ -C config-file ] [ -U uses ] [ -T timeout ] [ -D ]
12              [ -s ] [ -k ] [ -p ssf ]
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DESCRIPTION

15       pop3d is an POP3 server.  It accepts commands on its standard input and
16       responds on its standard output.  It MUST be invoked by master(8)  with
17       those descriptors attached to a remote client connection.
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19       pop3d reads its configuration options out of the imapd.conf(5) file un‐
20       less specified otherwise by -C.
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22       If the directory log/user exists under the directory specified  in  the
23       configdirectory  configuration  option, then pop3d will create protocol
24       telemetry logs for sessions authenticating as user.
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26       The telemetry logs will be stored in  the  log/user  directory  with  a
27       filename of the pop3d process-id.
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OPTIONS

30       -C config-file
31              Use the specified configuration file config-file rather than the
32              default imapd.conf(5).
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34       -U uses
35              The maximum number of times that the process should be used  for
36              new connections before shutting down.  The default is 250.
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38       -T timeout
39              The  number of seconds that the process will wait for a new con‐
40              nection before shutting down.  Note that a  value  of  0  (zero)
41              will disable the timeout.  The default is 60.
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43       -D     Run external debugger specified in debug_command.
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45       -s     Serve  POP3 over SSL (pop3s).  All data to and from pop3d is en‐
46              crypted using the Secure Sockets Layer.
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48       -k     Serve MIT's KPOP (Kerberized POP) protocol instead.
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50       -p ssf Tell pop3d that an external  layer  exists.   An  SSF  (security
51              strength  factor)  of  1 means an integrity protection layer ex‐
52              ists.  Any higher SSF implies some form of privacy protection.
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EXAMPLES

55       pop3d is commonly included in the  SERVICES  section  of  cyrus.conf(5)
56       like so:
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58          SERVICES {
59              imap        cmd="imapd -U 30" listen="imap" prefork=0
60              imaps       cmd="imapd -s -U 30" listen="imaps" prefork=0 maxchild=100
61              pop3        cmd="pop3d -U 30" listen="pop3" prefork=0
62              pop3s       cmd="pop3d -s -U 30" listen="pop3s" prefork=0 maxchild=100
63              lmtpunix    cmd="lmtpd" listen="/var/run/cyrus/socket/lmtp" prefork=0 maxchild=20
64              sieve       cmd="timsieved" listen="sieve" prefork=0
65              notify      cmd="notifyd" listen="/var/run/cyrus/socket/notify" proto="udp" prefork=1
66              httpd       cmd="httpd" listen=8080 prefork=1 maxchild=20
67          }
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FILES

70       /etc/imapd.conf
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SEE ALSO

73       imapd.conf(5), master(8)
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AUTHOR

76       The Cyrus Team, Nic Bernstein (Onlight)
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79       1993–2023, The Cyrus Team
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843.8.1                            Sep 11, 2023                         POP3D(8)
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