Provided by: spamassassin_3.1.0a-2ubuntu1_all bug

NAME

       spamd - daemonized version of spamassassin

SYNOPSIS

       spamd [options]

       Options:

        -l, --allow-tell                   Allow learning/reporting
        -c, --create-prefs                 Create user preferences files
        -C path, --configpath=path         Path for default config files
        --siteconfigpath=path              Path for site configs
        -d, --daemonize                    Daemonize
        -h, --help                         Print usage message.
        -i [ipaddr], --listen-ip=ipaddr    Listen on the IP ipaddr
        -p port, --port=port               Listen on specified port
        -m num, --max-children=num         Allow maximum num children
        --min-children=num                 Allow minimum num children
        --min-spare=num                    Lower limit for number of spare children
        --max-spare=num                    Upper limit for number of spare children
        --max-conn-per-child=num           Maximum connections accepted by child
                                           before it is respawned
        --round-robin                      Use traditional prefork algorithm
        --timeout-tcp=secs                 Connection timeout for client headers
        --timeout-child=secs               Connection timeout for message checks
        -q, --sql-config                   Enable SQL config (only useful with -x)
        -Q, --setuid-with-sql              Enable SQL config (only useful with -x,
                                           enables use of -H)
        --ldap-config                      Enable LDAP config (only useful with -x)
        --setuid-with-ldap                 Enable LDAP config (only useful with -x,
                                           enables use of -H)
        --virtual-config-dir=dir           Enable pattern based Virtual configs
                                           (needs -x)
        -r pidfile, --pidfile              Write the process id to pidfile
        -s facility, --syslog=facility     Specify the syslog facility
        --syslog-socket=type               How to connect to syslogd
        -u username, --username=username   Run as username
        -v, --vpopmail                     Enable vpopmail config
        -x, --nouser-config                Disable user config files
        --auth-ident                       Use ident to authenticate spamc user
        --ident-timeout=timeout            Timeout for ident connections
        -A host,..., --allowed-ips=..,..   Limit ip addresses which can connect
        -D, --debug[=areas]                Print debugging messages (for areas)
        -L, --local                        Use local tests only (no DNS)
        -P, --paranoid                     Die upon user errors
        -H [dir], --helper-home-dir[=dir]  Specify a different HOME directory
        --ssl                              Run an SSL server
        --server-key keyfile               Specify an SSL keyfile
        --server-cert certfile             Specify an SSL certificate
        --socketpath=path                  Listen on given UNIX domain socket
        --socketowner=name                 Set UNIX domain socket file’s owner
        --socketgroup=name                 Set UNIX domain socket file’s group
        --socketmode=mode                  Set UNIX domain socket file’s mode

DESCRIPTION

       The purpose of this program is to provide a daemonized version of the
       spamassassin executable.  The goal is improving throughput performance
       for automated mail checking.

       This is intended to be used alongside "spamc", a fast, low-overhead C
       client program.

       See the README file in the "spamd" directory of the SpamAssassin
       distribution for more details.

       Note: Although "spamd" will check per-user config files for every
       message, any changes to the system-wide config files will require
       either restarting spamd or forcing it to reload itself via SIGHUP for
       the changes to take effect.

       Note: If "spamd" receives a SIGHUP, it internally reloads itself, which
       means that it will change its pid and might not restart at all if its
       environment changed  (ie. if it can’t change back into its own
       directory).  If you plan to use SIGHUP, you should always start "spamd"
       with the -r switch to know its current pid.

OPTIONS

       Options of the long form can be shortened as long as they remain
       unambiguous.  (i.e. --dae can be used instead of --daemonize) Also,
       boolean options (like --user-config) can be negated by adding no
       (--nouser-config), however, this is usually unnecessary.

       -l, --allow-tell
           Allow learning and forgetting (to a local Bayes database),
           reporting and revoking (to a remote database) by spamd. The client
           issues a TELL command to tell what type of message is being
           processed and whether local (learn/forget) or remote
           (report/revoke) databases should be updated.

           Note that spamd always trusts the username passed in (unless
           --auth-ident is used) so clients could maliciously learn messages
           for other users. (This is not ususally a concern with an SQL Bayes
           store as users will typically have read-write access directly to
           the database, and can also use "sa-learn" with the -u option to
           achieve the same result.)

       -c, --create-prefs
           Create user preferences files if they don’t exist (default: don’t).

       -C path, --configpath=path
           Use the specified path for locating the distributed configuration
           files.  Ignore the default directories (usually
           "/usr/share/spamassassin" or similar).

       --siteconfigpath=path
           Use the specified path for locating site-specific configuration
           files.  Ignore the default directories (usually "/etc/spamassassin"
           or similar).

       -d, --daemonize
           Detach from starting process and run in background (daemonize).

       -h, --help
           Print a brief help message, then exit without further action.

       -i [ipaddress], --listen-ip[=ipaddress], --ip-address[=ipaddress]
           Tells spamd to listen on the specified IP address (defaults to
           127.0.0.1).  If you specify no IP address after the switch, spamd
           will listen on all interfaces.  (This is equal to the address
           0.0.0.0).  You can also use a valid hostname which will make spamd
           listen on the first address that name resolves to.

       -p port, --port=port
           Optionally specifies the port number for the server to listen on
           (default: 783).

       -q, --sql-config
           Turn on SQL lookups even when per-user config files have been
           disabled with -x. this is useful for spamd hosts which don’t have
           user’s home directories but do want to load user preferences from
           an SQL database.

           If your spamc client does not support sending the "User:" header,
           like "exiscan", then the SQL username used will always be nobody.

       --ldap-config
           Turn on LDAP lookups. This is completely analog to "--sql-config",
           only it is using an LDAP server.

       -Q, --setuid-with-sql
           Turn on SQL lookups even when per-user config files have been
           disabled with -x and also setuid to the user.  This is useful for
           spamd hosts which want to load user preferences from an SQL
           database but also wish to support the use of -H (Helper home
           directories.)

       --setuid-with-ldap
           Turn on LDAP lookups even when per-user config files have been
           disabled with -x and also setuid to the user.  This is again
           completely analog to "--setuid-with-sql", only it is using an LDAP
           server.

       --virtual-config-dir=pattern
           This option specifies where per-user preferences can be found for
           virtual users, for the -x switch. The pattern is used as a base
           pattern for the directory name.  Any of the following escapes can
           be used:

           %u -- replaced with the full name of the current user, as sent by
           spamc.
           %l -- replaced with the ’local part’ of the current username.  In
           other words, if the username is an email address, this is the part
           before the "@" sign.
           %d -- replaced with the ’domain’ of the current username.  In other
           words, if the username is an email address, this is the part after
           the "@" sign.
           %% -- replaced with a single percent sign (%).

           So for example, if "/vhome/users/%u/spamassassin" is specified, and
           spamc sends a virtual username of "jm@example.com", the directory
           "/vhome/users/jm@example.com/spamassassin" will be used.

           The set of characters allowed in the virtual username for this path
           are restricted to:

                   A-Z a-z 0-9 - + _ . , @ =

           All others will be replaced by underscores ("_").

           This path must be a writable directory.  It will be created if it
           does not already exist.  If a file called user_prefs exists in this
           directory (note: not in a ".spamassassin" subdirectory!), it will
           be loaded as the user’s preferences.  The Bayes databases for that
           user will be stored in this directory.

           Note that this requires that -x is used, and cannot be combined
           with SQL- or LDAP-based configuration.

           The pattern must expand to an absolute directory when spamd is
           running daemonized (-d).

       -r pidfile, --pidfile=pidfile
           Write the process ID of the spamd parent to the file specified by
           pidfile.  The file will be unlinked when the parent exits.  Note
           that when running with the -u option, the file must be writable by
           that user.

       -v, --vpopmail
           Enable vpopmail config.  If specified with with -u set to the
           vpopmail user, this allows spamd to lookup/create user_prefs in the
           vpopmail user’s own maildir.  This option is useful for vpopmail
           virtual users who do not have an entry in the system /etc/passwd
           file.

           Currently, use of this without -u is not supported.

       -s facility, --syslog=facility
           Specify the syslog facility to use (default: mail).  If "stderr" is
           specified, output will be written to stderr. (This is useful if
           you’re running "spamd" under the "daemontools" package.) With a
           facility of "file", all output goes to spamd.log. facility is
           interpreted as a file name to log to if it contains any characters
           except a-z and 0-9. "null" disables logging completely (used
           internally).

           Examples:      spamd -s mail                 # use syslog, facility
           mail (default)      spamd -s ./mail               # log to file
           ./mail      spamd -s stderr 2>/dev/null   # log to stderr, throw
           messages away      spamd -s null                 # the same as
           above      spamd -s file                 # log to file ./spamd.log
                spamd -s /var/log/spamd.log   # log to file /var/log/spamd.log

           If logging to a file is enabled and that log file is rotated, the
           spamd server must be restarted with a SIGHUP. (If the log file is
           just truncated, this is not needed but still recommended.)

           Note that logging to a file does not use locking, so you cannot
           intermix logging from spamd and other processes into the same file.
           If you want to mix logging like this, use syslog instead.

           If you use syslog logging, it is essential to send a SIGHUP to the
           spamd daemon when you restart the syslogd daemon.  (This is due to
           a shortcoming in Perl’s syslog handling, where the disappearance of
           the connection to the syslogd is considered a fatal error.)

       --syslog-socket=type
           Specify how spamd should send messages to syslogd.  The options are
           "unix", "inet" or "none".   The default is to try "unix" first,
           falling back to "inet" if perl detects errors in its "unix"
           support.

           Some platforms, or versions of perl, are shipped with dysfunctional
           versions of the Sys::Syslog package which do not support some
           socket types, so you may need to set this.  If you get error
           messages regarding __PATH_LOG or similar from spamd, try changing
           this setting.

           The socket type "file" is used internally and should not be
           specified.  Use the "-s" switch instead.

       -u username, --username=username
           Run as the named user.  If this option is not set, the default
           behaviour is to setuid() to the user running "spamc", if "spamd" is
           running as root.

           Note: "--username=root" is not a valid option.  If specified,
           "spamd" will exit with a fatal error on startup.

       -x, --nouser-config, --user-config
           Turn off(on) reading of per-user configuration files (user_prefs)
           from the user’s home directory.  The default behaviour is to read
           per-user configuration from the user’s home directory.

           This option does not disable or otherwise influence the SQL, LDAP
           or Virtual Config Dir settings.

       --auth-ident
           Verify the username provided by spamc using ident.  This is only
           useful if connections are only allowed from trusted hosts (because
           an identd that lies is trivial to create) and if spamc REALLY
           SHOULD be running as the user it represents.  Connections are
           terminated immediately if authentication fails.  In this case,
           spamc will pass the mail through unchecked.  Failure to connect to
           an ident server, and response timeouts are considered
           authentication failures.  This requires that Net::Ident be
           installed.

       --ident-timeout=timeout
           Wait at most timeout seconds for a response to ident queries.
           Authentication that takes long that timeout seconds will fail, and
           mail will not be processed.  Setting this to 0.0 or less results in
           no timeout, which is STRONGLY discouraged.  The default is 5
           seconds.

       -A host,..., --allowed-ips=host,...
           Specify a list of authorized hosts or networks which can connect to
           this spamd instance. Single IP addresses can be given, ranges of IP
           addresses in address/masklength CIDR format, or ranges of IP
           addresses by listing 3 or less octets with a trailing dot.
           Hostnames are not supported, only IP addresses.  This option can be
           specified multiple times, or can take a list of addresses separated
           by commas.  Examples:

           -A 10.11.12.13 -- only allow connections from 10.11.12.13.

           -A 10.11.12.13,10.11.12.14 -- only allow connections from
           10.11.12.13 and 10.11.12.14.

           -A 10.200.300.0/24 -- allow connections from any machine in the
           range "10.200.300.*".

           -A 10. -- allow connections from any machine in the range
           "10.*.*.*".

           By default, connections are only accepted from localhost
           [127.0.0.1].

       -D [area,...], --debug [area,...]
           Produce debugging output. If no areas are listed, all debugging
           information is printed. Diagnostic output can also be enabled for
           each area individually; area is the area of the code to instrument.
           For example, to produce diagnostic output on bayes, learn, and dns,
           use:

                   spamassassin -D bayes,learn,dns

           Higher priority informational messages that are suitable for
           logging in normal circumstances are available with an area of
           "info".

       -L, --local
           Perform only local tests on all mail.  In other words, skip DNS and
           other network tests.  Works the same as the "-L" flag to
           spamassassin(1).

       -P, --paranoid
           Die on user errors (for the user passed from spamc) instead of
           falling back to user nobody and using the default configuration.

       -m number , --max-children=number
           This option specifies the maximum number of children to spawn.
           Spamd will spawn that number of children, then sleep in the
           background until a child dies, wherein it will go and spawn a new
           child.

           Incoming connections can still occur if all of the children are
           busy, however those connections will be queued waiting for a free
           child.  The minimum value is 1, the default value is 5.

           Please note that there is a OS specific maximum of connections that
           can be queued (Try "perl -MSocket -e’print SOMAXCONN’" to find this
           maximum).

           Note that if you run too many servers for the amount of free RAM
           available, you run the danger of hurting performance by causing a
           high swap load as server processes are swapped in and out
           continually.

       --min-children=number
           The minimum number of children that will be kept running.  The
           minimum value is 1, the default value is 1.  If you have lots of
           free RAM, you may want to increase this.

       --min-spare=number
           The lower limit for the number of spare children allowed to run.  A
           spare, or idle, child is one that is not handling a scan request.
           If there are too few spare children available, a new server will be
           started every second or so.  The default value is 1.

       --max-spare=number
           The upper limit for the number of spare children allowed to run.
           If there are too many spare children, one will be killed every
           second or so until the number of idle children is in the desired
           range.  The default value is 2.

       --max-conn-per-child=number
           This option specifies the maximum number of connections each child
           should process before dying and letting the master spamd process
           spawn a new child.  The minimum value is 1, the default value is
           200.

       --round-robin
           By default, "spamd" will attempt to keep a small number of "hot"
           child processes as busy as possible, and keep any others as idle as
           possible, using something similar to the Apache httpd server
           scaling algorithm.  This is accomplished by the master process
           coordinating the activities of the children.  This switch will
           disable this scaling algorithm, and the behaviour seen in the 3.0.x
           versions will be used instead, where all processes receive an equal
           load and no scaling takes place.

       --timeout-tcp=number
           This option specifies the number of seconds to wait for headers
           from a client (spamc) before closing the connection.  The minimum
           value is 1, the default value is 30, and a value of 0 will disable
           socket timeouts completely.

       --timeout-child=number
           This option specifies the number of seconds to wait for a spamd
           child to to process or check a message.  The minimum value is 1,
           the default value is 300, and a value of 0 will disable child
           timeouts completely.

       -H directory, --helper-home-dir=directory
           Specify that external programs such as Razor, DCC, and Pyzor should
           have a HOME environment variable set to a specific directory.  The
           default is to use the HOME environment variable setting from the
           shell running spamd.  By specifying no argument, spamd will use the
           spamc caller’s home directory instead.

       --ssl
           Accept only SSL connections.  The IO::Socket::SSL perl module must
           be installed.

       --server-key keyfile
           Specify the SSL key file to use for SSL connections.

       --server-cert certfile
           Specify the SSL certificate file to use for SSL connections.

       --socketpath pathname
           Listen on UNIX domain path pathname instead of a TCP socket.

           Warning: the Perl support on BSD platforms for UNIX domain sockets
           seems to have a bug regarding paths of over 100 bytes or so
           (SpamAssassin bug 4380).  If you see a ’could not find newly-
           created UNIX socket’ error message, and the path appears truncated,
           this may be the cause.  Try using a shorter path to the socket.

       --socketowner name
           Set UNIX domain socket to be owned by the user named name.  Note
           that this requires that spamd be started as "root", and if "-u" is
           used, that user should have write permissions to unlink the file
           later, for when the "spamd" server is killed.

       --socketgroup name
           Set UNIX domain socket to be owned by the group named name.  See
           "--socketowner" for notes on ownership and permissions.

       --socketmode mode
           Set UNIX domain socket to use the octal mode mode.  Note that if
           "-u" is used, that user should have write permissions to unlink the
           file later, for when the "spamd" server is killed.

SEE ALSO

       spamc(1) spamassassin(1) Mail::SpamAssassin::Conf(3)
       Mail::SpamAssassin(3)

PREREQUISITES

       "Mail::SpamAssassin"

AUTHORS

       The SpamAssassin(tm) Project (http://spamassassin.apache.org/)

LICENSE

       SpamAssassin is distributed under the Apache License, Version 2.0, as
       described in the file "LICENSE" included with the distribution.