1POP3D(8) Cyrus IMAP POP3D(8)
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6 pop3d - Cyrus IMAP documentation
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8 POP3 server process
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11 pop3d [ -C config-file ] [ -U uses ] [ -T timeout ] [ -D ]
12 [ -s ] [ -k ] [ -p ssf ]
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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
20 unless 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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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
46 encrypted 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
52 exists. Any higher SSF implies some form of privacy protection.
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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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70 /etc/imapd.conf
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73 imapd.conf(5), master(8)
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76 The Cyrus Team, Nic Bernstein (Onlight)
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79 1993-2017, The Cyrus Team
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843.0.13 December 16, 2019 POP3D(8)