SPAMC(1)              User Contributed Perl Documentation             SPAMC(1)

       spamc - client for spamd

       spamc [options] < message

       Spamc is the client half of the spamc/spamd pair.  It should be used in
       place of "spamassassin" in scripts to process mail.  It will read the
       mail from STDIN, and spool it to its connection to spamd, then read the
       result back and print it to STDOUT.  Spamc has extremely low overhead
       in loading, so it should be much faster to load than the whole
       spamassassin program.

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

       All options detailed below can be passed as command line arguments, or
       be contained in a configuration file, as described in the CONFIGURATION
       FILE section below.

       Note that the long options, a la "--long-options", are new as of
       SpamAssassin 3.2.0, and were not available in earlier versions.

       -B, --bsmtp
           Assume input is a single BSMTP-formatted message. In other words,
           spamc will pull out everything between the DATA line and the lone-
           dot line to feed to spamd, and will place the spamd output back in
           the same envelope (thus, any SIZE extension in your BSMTP file will
           cause many problems).

       -c, --check
           Just check if the message is spam or not.  Set process exitcode to
           1 if message is spam, 0 if not spam or processing failure occurs.
           Will print score/threshold to stdout (as ints) or 0/0 if there was
           an error.  Combining -c and -E is a no-op, since -c implies the
           behaviour of -E.

       -d host[,host2], --dest=host[,host2]
           In TCP/IP mode, connect to spamd server on given host (default:
           localhost).  Several hosts can be specified if separated by commas.

           If host resolves to multiple addresses, then spamc will fail-over
           to the other addresses, if the first one cannot be connected to.
           It will first try all addresses of one host before it tries the
           next one in the list.  Note that this fail-over behaviour is
           incompatible with -x; if that switch is used, fail-over will not

       -4  Use IPv4 only for connecting to server. Restricts domain name
           resolution of spamd server host(s) to address family AF_INET
           through the "hints.ai_family" flag in the call to getaddrinfo(3).

       -6  Use IPv6 only for connecting to server. Restricts domain name
           resolution of spamd server host(s) to address family AF_INET6
           through the "hints.ai_family" flag in the call to getaddrinfo(3).

       -e command [args], --pipe-to command [args]
           Instead of writing to stdout, pipe the output to command's standard
           input.  Note that there is a very slight chance mail will be lost
           here, because if the fork-and-exec fails there's no place to put
           the mail message.

           Note that this must be the LAST command line option, as everything
           after the -e is taken as arguments to the command (it's like rxvt
           or xterm).

           This option is not supported on Win32 platforms.

       -E, --exitcode
           Filter according to the other options, but set the process exitcode
           to 1 if message is spam, 0 if not spam or processing failure

       -F /path/to/file, --config=path
           Specify a configuration file to read additional command-line flags
           from.  See CONFIGURATION FILE below.

       -h, --help
           Print this help message and terminate without action.

       -H, --randomize
           For TCP/IP sockets, randomize the IP addresses returned for the
           hosts given by the -d switch. This provides for a simple kind of
           load balancing.  It will try only three times though.

       -l, --log-to-stderr
           Send log messages to stderr, instead of to the syslog.

       -L learn type, --learntype=type
           Send message to spamd for learning.  The "learn type" can be either
           spam, ham or forget.  The exitcode for spamc will be set to 5 if
           the message was learned, or 6 if it was already learned, under a
           condition that a --no-safe-fallback option is selected too.

           Note that the "spamd" must run with the "--allow-tell" option for
           this to work.

       -C report type, --reporttype=type
           Report or revoke a message to one of the configured collaborative
           filtering databases.  The "report type" can be either report or

           Note that the "spamd" must run with the "--allow-tell" option for
           this to work.

       -p port, --port=port
           In TCP/IP mode, connect to spamd server listening on given port
           (default: 783).

       -r, --full-spam
           Just output the SpamAssassin report text to stdout, if the message
           is spam.  If the message is ham (non-spam), nothing will be
           printed.  The first line of the output is the message score and the
           threshold, in this format:


       -R, --full
           Just output the SpamAssassin report text to stdout, for all
           messages.  See -r for details of the output format used.

       -s max_size, --max-size=max_size
           Set the maximum message size which will be sent to spamd -- any
           bigger than this threshold and the message will be returned
           unprocessed (default: 500 KB).  If spamc gets handed a message
           bigger than this, it won't be passed to spamd.  The maximum message
           size is 256 MB.

           The size is specified in bytes, as a positive integer greater than
           0.  For example, -s 500000.

           Retry connecting to spamd retries times.  The default is 3 times.

           Sleep for sleep seconds between attempts to connect to spamd.  The
           default is 1 second.

           Retry filtering retries times if the spamd process fails (usually
           times out).  This differs from --connect-retries in that it times
           out the transaction after the TCP connection has been established
           successfully.  The default is 1 time (ie. one attempt and no

           Sleep for sleep seconds between failed spamd filtering attempts.
           The default is 1 second.

       -S, --ssl, --ssl
           If spamc was built with support for SSL, encrypt data to and from
           the spamd process with SSL; spamd must support SSL as well.

       -t timeout, --timeout=timeout
           Set the timeout for spamc-to-spamd communications (default: 600, 0
           disables).  If spamd takes longer than this many seconds to reply
           to a message, spamc will abort the connection and treat this as a
           failure to connect; in other words the message will be returned

       -n timeout, --connect-timeout=timeout
           Set the timeout for spamc-to-spamd connection establishment
           (default: 600, 0 disables). If spamc takes longer than this many
           seconds to establish a connection to spamd, spamc will abort the
           connection and treat this as a failure to connect; in other words
           the message will be returned unprocessed.

       -u username, --username=username
           To have spamd use per-user-config files, run spamc as the user
           whose config files spamd should load; by default the effective
           user-ID is sent to spamd.  If you're running spamc as some other
           user, though, (eg. root, mail, nobody, cyrus, etc.) then you may
           use this flag to override the default.

       -U socketpath, --socket=path
           Connect to "spamd" via UNIX domain socket socketpath instead of a
           TCP/IP connection.

           This option is not supported on Win32 platforms.

       -V, --version
           Report the version of this "spamc" client.  If built with SSL
           support, an additional line will be included noting this, like so:

             SpamAssassin Client version 3.0.0-rc4
               compiled with SSL support (OpenSSL 0.9.7d 17 Mar 2004)

       -x, --no-safe-fallback
           Disables the 'safe fallback' error-recovery method, which passes
           through the unaltered message if an error occurs.  Instead, exit
           with an error code, and let the MTA queue up the mails for a retry
           later.  See also "EXIT CODES".

           This also disables the TCP fail-over behaviour from -d.

       -X, --unavailable-tempfail
           When disabling 'safe fallback' with -x, this option will turn
           EX_UNAVAILABLE errors into EX_TEMPFAIL. This may allow your MTA to
           defer mails with a temporary SMTP error instead of bouncing them
           with a permanent SMTP error.  See also "EXIT CODES".

       -y, --tests
           Just output the names of the tests hit to stdout, on one line,
           separated by commas.

       -K  Perform a keep-alive check of spamd, instead of a full message

       -z  Use gzip compression to compress the mail message sent to "spamd".
           This is useful for long-distance use of spamc over the internet.
           Note that this relies on "zlib" being installed on the "spamc"
           client side, and the "Compress::Zlib" perl module on the server
           side; an error will be returned otherwise.

           Perform a scan, but instead of allowing any part of the message
           (header and body) to be rewritten, limit rewriting to only the
           message headers. This is much more efficient in bandwidth usage,
           since the response message transmitted back from the spamd server
           will not include the body.

           Note that this only makes sense if you are using "report_safe 0" in
           the scanning configuration on the remote end; with "report_safe 1",
           it is likely to result in corrupt messages.

       The above command-line switches can also be loaded from a configuration

       The format of the file is similar to the SpamAssassin rules files;
       blank lines and lines beginning with "#" are ignored.  Any space-
       separated words are considered additions to the command line, and are
       prepended. Newlines are treated as equivalent to spaces. Existing
       command line switches will override any settings in the configuration

       If the -F switch is specified, that file will be used.  Otherwise,
       "spamc" will attempt to load spamc.conf in "SYSCONFDIR" (default:
       /etc/spamassassin). If that file doesn't exist, and the -F switch is
       not specified, no configuration file will be read.


           # spamc global configuration file

           # connect to "", port 783
           -p 783

           # max message size for scanning = 350k
           -s 350000

       By default, spamc will use the 'safe fallback' error recovery method.
       That means, it will always exit with an exit code of 0, even if an
       error was encountered.  If any error occurrs, it will simply pass
       through the unaltered message.

       The -c and -E options modify this; instead, spamc will use an exit code
       of 1 if the message is determined to be spam.

       If one of the "-x", "-L" or "-C" options are specified, 'safe fallback'
       will be disabled, and certain error conditions related to communication
       between spamc and spamd will result in an error code.

       The exit codes used are as follows:

           EX_USAGE        64  command line usage error
           EX_DATAERR      65  data format error
           EX_NOINPUT      66  cannot open input
           EX_NOUSER       67  addressee unknown
           EX_NOHOST       68  host name unknown
           EX_UNAVAILABLE  69  service unavailable
           EX_SOFTWARE     70  internal software error
           EX_OSERR        71  system error (e.g., can't fork)
           EX_OSFILE       72  critical OS file missing
           EX_CANTCREAT    73  can't create (user) output file
           EX_IOERR        74  input/output error
           EX_TEMPFAIL     75  temp failure; user is invited to retry
           EX_PROTOCOL     76  remote error in protocol
           EX_NOPERM       77  permission denied
           EX_CONFIG       78  configuration error

           * The EX_TOOBIG error level is never used.  If spamc receives a message
             that is too big, the exit code will be 0.

           EX_TOOBIG       98  message was too big to process (see --max-size)

       spamd(8) spamassassin(1) Mail::SpamAssassin(3)


       The SpamAssassin(tm) Project <>

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

perl v5.26.1                      2021-03-29                          SPAMC(1)
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