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#!/usr/bin/perl -T -w # <@LICENSE> # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to you under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at: # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # </@LICENSE> use strict; use warnings; use re 'taint'; use File::Spec; my $PREFIX = '/usr'; # substituted at 'make' time my $DEF_RULES_DIR = '/usr/share/spamassassin'; # substituted at 'make' time my $LOCAL_RULES_DIR = '/etc/spamassassin'; # substituted at 'make' time my $LOCAL_STATE_DIR = '/var/lib/spamassassin'; # substituted at 'make' time use lib '/usr/share/perl5'; # substituted at 'make' time BEGIN { # Locate locally installed SA libraries *without* using FindBin, which # generates warnings and causes more trouble than its worth. We don't # need to be too smart about this BTW. my @bin = File::Spec->splitpath($0); my $bin = ( $bin[0] ? File::Spec->catpath( @bin[ 0 .. 1 ], '' ) : $bin[1] ) # /home/jm/foo -> /home/jm || File::Spec->curdir; # foo -> . # check to make sure it wasn't just installed in the normal way. # note that ./lib/Mail/SpamAssassin.pm takes precedence, for # building SpamAssassin on a machine where an old version is installed. if (-e $bin.'/lib/Mail/SpamAssassin.pm' || !-e '/usr/share/perl5/Mail/SpamAssassin.pm' ) { my $searchrelative; # Firstly, are we running "make test" in the "t" dir? the test files # *need* to use 'blib', so that 'use bytes' is removed for pre-5.6 perls # beforehand by the preproc. However, ./spamassassin does not, as the # preproc will have stripped out the "use rule files from cwd" code from # Mail::SpamAssassin. So we want to use blib just for the t scripts. # This is disabled during the "make install" process. if ($searchrelative && $bin eq '../' && -e '../blib/lib/Mail/SpamAssassin.pm') { unshift ( @INC, '../blib/lib' ); } else { # These are common paths where the SA libs might be found. foreach ( qw(lib ../lib/site_perl ../lib/spamassassin ../share/spamassassin/lib)) { my $dir = File::Spec->catdir( $bin, split ( '/', $_ ) ); if ( -f File::Spec->catfile( $dir, "Mail", "SpamAssassin.pm" ) ) { unshift ( @INC, $dir ); last; } } } } } use Getopt::Long; use Pod::Usage; use POSIX qw(locale_h setsid sigprocmask _exit); use Mail::SpamAssassin; use Mail::SpamAssassin::ArchiveIterator; use Mail::SpamAssassin::Util::Progress; use Mail::SpamAssassin::Logger qw(log_message); BEGIN { # redirect __WARN__, but NOT until after the # Mail::SpamAssassin::Logger class has been parsed. # do not trap warnings here based on eval scope; evals are very # common throughout. die()s can be trapped in future though. $SIG{__WARN__} = sub { log_message("warn", $_[0]); }; }; POSIX::setlocale(LC_TIME,'C'); my %resphash = ( EX_OK => 0, # no problems EX_USAGE => 64, # command line usage error EX_DATAERR => 65, # data format error EX_NOINPUT => 66, # cannot open input EX_NOUSER => 67, # addressee unknown EX_NOHOST => 68, # host name unknown EX_UNAVAILABLE => 69, # service unavailable EX_SOFTWARE => 70, # internal software error EX_OSERR => 71, # system error (e.g., can't fork) EX_OSFILE => 72, # critical OS file missing EX_CANTCREAT => 73, # can't create (user) output file EX_IOERR => 74, # input/output error EX_TEMPFAIL => 75, # temp failure; user is invited to retry EX_PROTOCOL => 76, # remote error in protocol EX_NOPERM => 77, # permission denied EX_CONFIG => 78, # configuration error ); sub print_version { printf("SpamAssassin version %s\n running on Perl version %s\n", Mail::SpamAssassin::Version(), join(".", map( 0+($_||0), ($] =~ /(\d)\.(\d{3})(\d{3})?/ )))) or die "error writing: $!"; } sub print_usage_and_exit { my ( $message, $respnam ) = @_; $respnam ||= 'EX_USAGE'; if ($respnam eq 'EX_OK' ) { print_version(); print("\n") or die "error writing: $!"; } pod2usage( -verbose => 0, -message => $message, -exitval => $resphash{$respnam}, -input => "spamassassin-run.pod", -pathlist => \@INC, ); } sub usage { my ( $verbose, $message ) = @_; my $ver = Mail::SpamAssassin::Version(); print "SpamAssassin version $ver\n" or die "error writing: $!"; pod2usage( -verbose => $verbose, -message => $message, -exitval => 64, -input => "spamassassin-run.pod", -pathlist => \@INC ); } # Check to make sure the script version and the module version matches. # If not, die here! Also, deal with unchanged VERSION macro. if ($Mail::SpamAssassin::VERSION ne '4.000000' && '4.000000' ne "\@\@VERSION\@\@") { die 'spamassassin: spamassassin script is v4.000000, but using modules v'.$Mail::SpamAssassin::VERSION."\n"; } # by default: # - create user preference files # - have ArchiveIterator detect the input message format (file vs dir) # my %opt = ( 'create-prefs' => 1, 'format' => 'detect', pre => [], cf => [] ); my $doing_welcomelist_operation = 0; my $count = 0; my @targets = (); my $exitvalue; my $init_results = 0; my $progress; my $total_messages = 0; # gnu_getopt is not available in Getopt::Long 2.24, see bug 732 # gnu_compat neither. Getopt::Long::Configure( qw(bundling no_getopt_compat no_auto_abbrev no_ignore_case)); GetOptions( 'add-addr-to-blocklist=s' => \$opt{'add-addr-to-blocklist'}, 'add-addr-to-welcomelist=s' => \$opt{'add-addr-to-welcomelist'}, 'add-addr-to-blacklist=s' => \$opt{'add-addr-to-blocklist'}, # removed in 4.1 'add-addr-to-whitelist=s' => \$opt{'add-addr-to-welcomelist'}, # removed in 4.1 'add-to-blocklist' => \$opt{'add-to-blocklist'}, 'add-to-welcomelist|W' => \$opt{'add-to-welcomelist'}, 'add-to-blacklist' => \$opt{'add-to-blocklist'}, # removed in 4.1 'add-to-whitelist' => \$opt{'add-to-welcomelist'}, # removed in 4.1 'configpath|config-file|config-dir|c|C=s' => \$opt{'configpath'}, 'create-prefs!' => \$opt{'create-prefs'}, 'pre=s' => \@{$opt{'pre'}}, 'cf=s' => \@{$opt{'cf'}}, 'debug|D:s' => \$opt{'debug'}, 'error-code|exit-code|e:i' => \$opt{'error-code'}, 'help|h|?' => \$opt{'help'}, '4|ipv4only|ipv4-only|ipv4' => sub { $opt{'force_ipv4'} = 1; $opt{'force_ipv6'} = 0; }, '6' => sub { $opt{'force_ipv6'} = 1; $opt{'force_ipv4'} = 0; }, 'lint' => \$opt{'lint'}, 'net' => \$opt{'net'}, 'local-only|local|L' => \$opt{'local'}, 'mbox' => sub { $opt{'format'} = 'mbox'; }, 'mbx' => sub { $opt{'format'} = 'mbx'; }, 'prefspath|prefs-file|p=s' => \$opt{'prefspath'}, 'remove-addr-from-welcomelist=s' => \$opt{'remove-addr-from-welcomelist'}, 'remove-from-welcomelist|R' => \$opt{'remove-from-welcomelist'}, 'remove-addr-from-whitelist=s' => \$opt{'remove-addr-from-welcomelist'}, # removed in 4.1 'remove-from-whitelist' => \$opt{'remove-from-welcomelist'}, # removed in 4.1 'remove-markup|despamassassinify|d' => \$opt{'remove-markup'}, 'report|r' => \$opt{'report'}, 'revoke|k' => \$opt{'revoke'}, 'siteconfigpath=s' => \$opt{'siteconfigpath'}, 'test-mode|test|t' => \$opt{'test-mode'}, 'progress' => \$opt{'progress'}, 'version|V' => \$opt{'version'}, 'x' => sub { $opt{'create-prefs'} = 0 }, # # NOTE: These are old options. We should ignore (but warn about) # the ones that are now defaults. Everything else gets a die (see note2) # so the user doesn't get us doing something they didn't expect. # # NOTE2: 'die' doesn't actually stop the process, GetOptions() catches # it, then passes the error on, so we'll end up doing a Usage statement. # You can avoid that by doing an explicit exit in the sub. # # last in 2.3 'pipe|P' => sub { warn "The -P option is deprecated as 'pipe mode' is now the default behavior, ignoring.\n" }, 'F:i' => sub { warn "The -F option has been removed from spamassassin, please remove from your commandline and re-run.\n"; exit 2; }, 'add-from!' => sub { warn "The --add-from option has been removed from spamassassin, please remove from your commandline and re-run.\n"; exit 2; }, # last in 2.4 'stop-at-threshold|S' => sub { warn "The -S option has been deprecated and is no longer supported, ignoring.\n" }, # last in 2.6 'log-to-mbox|l:s' => sub { warn "The -l option has been deprecated and is no longer supported, ignoring.\n" }, 'warning-from|w:s' => sub { warn "The -w option has been removed from spamassassin, please remove from your commandline and re-run.\n"; exit 2; }, 'whitelist-factory|M:s' => sub { warn "The -M option has been removed from spamassassin, please remove from your commandline and re-run.\n"; exit 2; }, ) or print_usage_and_exit(); if ( defined $opt{'help'} ) { print_usage_and_exit("For more information read the spamassassin man page.\n", 'EX_OK'); } if ( defined $opt{'version'} ) { print_version(); exit($resphash{'EX_OK'}); } # set debug areas, if any specified (only useful for command-line tools) if (defined $opt{'debug'}) { $opt{'debug'} ||= 'all'; } if (Mail::SpamAssassin::Util::am_running_on_windows()) { binmode(STDIN) or die "cannot set binmode on STDIN: $!"; # bug 4363 binmode(STDOUT) or die "cannot set binmode on STDOUT: $!"; } # bug 5048: --lint should not cause network accesses # allow --net to override for testing if ($opt{'lint'} && !$opt{'net'}) { $opt{'local'} = 1; } # create the tester factory my $spamtest = Mail::SpamAssassin->new( { rules_filename => $opt{'configpath'}, site_rules_filename => $opt{'siteconfigpath'}, userprefs_filename => $opt{'prefspath'}, force_ipv4 => $opt{'force_ipv4'}, force_ipv6 => $opt{'force_ipv6'}, local_tests_only => $opt{'local'}, debug => $opt{'debug'}, dont_copy_prefs => ( $opt{'create-prefs'} ? 0 : 1 ), pre_config_text => join("\n", @{$opt{'pre'}})."\n", post_config_text => join("\n", @{$opt{'cf'}})."\n", require_rules => 1, PREFIX => $PREFIX, DEF_RULES_DIR => $DEF_RULES_DIR, LOCAL_RULES_DIR => $LOCAL_RULES_DIR, LOCAL_STATE_DIR => $LOCAL_STATE_DIR, } ); if ($opt{'lint'}) { $spamtest->debug_diagnostics(); my $res = $spamtest->lint_rules(); $spamtest->finish(); warn "lint: $res issues detected, please rerun with debug enabled for more information\n" if ($res and !$opt{'debug'}); # make sure we notice any write errors while flushing output buffer close STDOUT or die "error closing STDOUT: $!"; close STDIN or die "error closing STDIN: $!"; exit $res ? 1 : 0; } if ($opt{'remove-addr-from-welcomelist'} || $opt{'add-addr-to-welcomelist'} || $opt{'add-addr-to-blocklist'}) { $spamtest->init(1); if ( $opt{'add-addr-to-welcomelist'} ) { $spamtest->add_address_to_welcomelist($opt{'add-addr-to-welcomelist'}, 1); } elsif ( $opt{'remove-addr-from-welcomelist'} ) { $spamtest->remove_address_from_welcomelist($opt{'remove-addr-from-welcomelist'}, 1); } elsif ( $opt{'add-addr-to-blocklist'} ) { $spamtest->add_address_to_blocklist($opt{'add-addr-to-blocklist'}, 1); } else { die "spamassassin: oops! unhandled welcomelist operation"; } $spamtest->finish(); # make sure we notice any write errors while flushing output buffer close STDOUT or die "error closing STDOUT: $!"; close STDIN or die "error closing STDIN: $!"; exit(0); } # if we're going to do welcome/block-listing, let's prep now... if ( $opt{'remove-from-welcomelist'} or $opt{'add-to-welcomelist'} or $opt{'add-to-blocklist'} ) { $doing_welcomelist_operation = 1; $spamtest->init(1); } # if we're doing things in test mode, force disable long-term memory # functions like autowelcomelist and bayes autolearn. # XXX - feels like we need a plugin hook here so plugins can be made # aware and take appropriate action. if ($opt{'test-mode'}) { $spamtest->{'conf'}->{'use_auto_welcomelist'} = 0; $spamtest->{'conf'}->{'bayes_auto_learn'} = 0; } ########################################################################### # Deal with the target listing, and STDIN -> tempfile my $tempfile; # will be defined if stdin -> tempfile push(@targets, @ARGV); @targets = ('-') unless @targets; for(my $elem = 0; $elem <= $#targets; $elem++) { # ArchiveIterator doesn't really like STDIN, so if "-" is specified # as a target, make it a temp file instead. if ( $targets[$elem] =~ /(?:^|:)-$/ ) { if (defined $tempfile) { # uh-oh, stdin specified multiple times? warn "skipping extra stdin target (".$targets[$elem].")\n"; splice @targets, $elem, 1; $elem--; # go back to this element again next; } else { my $handle; ( $tempfile, $handle ) = Mail::SpamAssassin::Util::secure_tmpfile(); binmode $handle or die "cannot set binmode on file $tempfile: $!"; # avoid slurping the whole file into memory, copy chunk by chunk my($inbuf,$nread,$nwrites); while ( $nread = sysread(STDIN, $inbuf, 32*1024) ) { for (my $ofs = 0; $ofs < length($inbuf); $ofs += $nwrites) { $nwrites = $handle->syswrite($inbuf, length($inbuf)-$ofs, $ofs); defined $nwrites or die "error writing to $tempfile: $!"; } } undef $inbuf; # release storage defined $nread or die "error reading from STDIN: $!"; close $handle or die "cannot close $tempfile: $!"; # re-aim the targets at the tempfile instead of STDIN $targets[$elem] =~ s/-$/$tempfile/; } } # make sure the target list is in the normal AI format if ($targets[$elem] !~ /^[^:]*:[a-z]+:/) { my $format = $opt{'format'} || 'detect'; $targets[$elem] = join ( ":", '', $format, $targets[$elem] ); } } ########################################################################### setup_sig_handlers(); # Everything below here needs ArchiveIterator ... my $iter = Mail::SpamAssassin::ArchiveIterator->new( { 'opt_max_size' => 0, # no limit 'opt_want_date' => 0 } ); $iter->set_functions( \&wanted, \&result ); # Go run the messages! # bug 4930: use a temp variable since "||=" decides whether or not to set the # value before the RHS is actually run, so if the RHS separately sets the LHS # variable, things don't work right. Stupid global variables. ;) my $eval_stat; eval { my $runreturn = !$iter->run(@targets); $exitvalue ||= $runreturn; 1; } or do { $eval_stat = $@ ne '' ? $@ : "errno=$!"; chomp $eval_stat; }; $progress->final() if ($opt{progress} && $progress); # If we needed to make a tempfile, go delete it now. if (defined $tempfile) { unlink $tempfile or die "cannot unlink temporary file $tempfile: $!"; undef $tempfile; } # Let folks know how many messages were handled, as long as the handling # didn't produce output (ala: check, test, or remove_markup ...) if ( $opt{'report'} || $opt{'revoke'} || $doing_welcomelist_operation ) { print "$count message(s) examined.\n" or die "error writing: $!"; } # if the eval died from something, report it here and return an error. if (defined $eval_stat) { die $eval_stat; } $spamtest->finish() if $spamtest; # make sure we notice any write errors while flushing output buffer close STDOUT or die "error closing STDOUT: $!"; close STDIN or die "error closing STDIN: $!"; # Ok, exit! exit( $exitvalue || 0 ); ########################################################################### sub init_results { $init_results = 1; return unless $opt{'progress'}; $total_messages = $Mail::SpamAssassin::ArchiveIterator::MESSAGES; $progress = Mail::SpamAssassin::Util::Progress->new({total => $total_messages,}); } ########################################################################### sub result { my ($class, $result, $time) = @_; # don't open results files until we get here to avoid overwriting files &init_results if !$init_results; $progress->update($count) if ($opt{progress} && $progress); } ########################################################################### my $mail; # global, so signal handler can clean it up; bug 5626 # make sure it only returns false values so that result_sub() isn't called... sub wanted { $spamtest->timer_reset; # reset timers for each AI message my $dataref = $_[3]; $mail = $spamtest->parse($dataref); $count++; # This is a short cut -- doing welcome/block-list? Do it and return quickly. if ($doing_welcomelist_operation) { if ( $opt{'add-to-welcomelist'} ) { $spamtest->add_all_addresses_to_welcomelist($mail, 1); } elsif ( $opt{'remove-from-welcomelist'} ) { $spamtest->remove_all_addresses_from_welcomelist($mail, 1); } elsif ( $opt{'add-to-blocklist'} ) { $spamtest->add_all_addresses_to_blocklist($mail, 1); } else { warn "spamassassin: oops! unhandled welcomelist operation"; } $mail->finish(); $mail = undef; return 1; } # handle removing reports if ( $opt{'remove-markup'} ) { # If we're not going to retest, just remove the markup and print it out if ( !$opt{'test-mode'} ) { print $spamtest->remove_spamassassin_markup ($mail); $mail->finish(); $mail = undef; return 1; } else { # remove the markup and retest it... a little more tricky ... # go ahead and remove the markup, then fake that the clean version # was what was sent in # my $new_mail = $spamtest->parse( $spamtest->remove_spamassassin_markup($mail) ); $mail->finish(); $mail = $new_mail; } } # handle reporting and revoking if ( $opt{'report'} || $opt{'revoke'} ) { # Make sure the message is clean first ... my $new_mail = $spamtest->parse( $spamtest->remove_spamassassin_markup($mail) ); $mail->finish(); $mail = $new_mail; my $failed; if ( $opt{'report'} && !$spamtest->report_as_spam($mail) ) { $failed = 'report'; } if ( $opt{'revoke'} && !$spamtest->revoke_as_spam($mail) ) { $failed = 'revoke'; } if ($failed) { warn "spamassassin: warning, unable to $failed message\n"; warn "spamassassin: for more information, re-run with -D option to see debug output\n"; } $mail->finish(); $mail = undef; return 1; } # OK, do checks and put out the message. my $status = $spamtest->check($mail); print $status->rewrite_mail() or die "error writing: $!"; if ( $opt{'test-mode'} ) { print $status->get_report() or die "error writing: $!"; } # if this message was spam, set the exit value appropriately. if ( defined $opt{'error-code'} && $status->is_spam() && !defined $exitvalue ) { $exitvalue = $opt{'error-code'} || 5; } # clean up after ourselves $mail->finish(); $mail = undef; $status->finish(); return 1; } ########################################################################### sub setup_sig_handlers { $SIG{HUP} = \&kill_handler; $SIG{INT} = \&kill_handler; $SIG{TERM} = \&kill_handler; # $SIG{PIPE} = \&kill_handler; $SIG{PIPE} = 'IGNORE'; } sub kill_handler { my ($sig) = @_; warn "spamassassin: killed by SIG$sig\n"; if ($mail) { $mail->finish(); # bug 5626: remove temp files etc. $mail = undef; } if (defined $tempfile) { # bug 5557: additional paranoia about tmpfiles unlink $tempfile or warn "cannot unlink temporary file $tempfile: $!"; undef $tempfile; } close STDOUT; close STDIN; # ignoring status exit 15; } __END__ # --------------------------------------------------------------------------- =head1 NAME spamassassin - extensible email filter used to identify spam =head1 DESCRIPTION SpamAssassin is an intelligent email filter which uses a diverse range of tests to identify unsolicited bulk email, more commonly known as "spam". These tests are applied to email headers and content to classify email using advanced statistical methods. In addition, SpamAssassin has a modular architecture that allows other technologies to be quickly wielded against spam and is designed for easy integration into virtually any email system. =head1 SYNOPSIS For ease of access, the SpamAssassin manual has been split up into several sections. If you're intending to read these straight through for the first time, the suggested order will tend to reduce the number of forward references. Extensive additional documentation for SpamAssassin is available, primarily on the SpamAssassin web site and wiki. You should be able to view SpamAssassin's documentation with your man(1) program or perldoc(1). =head2 OVERVIEW spamassassin SpamAssassin overview (this section) =head2 CONFIGURATION Mail::SpamAssassin::Conf SpamAssassin configuration files =head2 USAGE spamassassin-run "spamassassin" front-end filtering script sa-learn train SpamAssassin's Bayesian classifier spamc client for spamd (faster than spamassassin) spamd spamassassin server (needed by spamc) =head2 DEFAULT PLUGINS Mail::SpamAssassin::Plugin::AskDNS Mail::SpamAssassin::Plugin::AutoLearnThreshold Mail::SpamAssassin::Plugin::Bayes Mail::SpamAssassin::Plugin::BodyEval Mail::SpamAssassin::Plugin::Check Mail::SpamAssassin::Plugin::DKIM Mail::SpamAssassin::Plugin::DMARC Mail::SpamAssassin::Plugin::DNSEval Mail::SpamAssassin::Plugin::FreeMail Mail::SpamAssassin::Plugin::HTMLEval Mail::SpamAssassin::Plugin::HTTPSMismatch Mail::SpamAssassin::Plugin::HashBL Mail::SpamAssassin::Plugin::HeaderEval Mail::SpamAssassin::Plugin::ImageInfo Mail::SpamAssassin::Plugin::MIMEEval Mail::SpamAssassin::Plugin::MIMEHeader Mail::SpamAssassin::Plugin::Pyzor Mail::SpamAssassin::Plugin::Razor2 Mail::SpamAssassin::Plugin::RelayEval Mail::SpamAssassin::Plugin::ReplaceTags Mail::SpamAssassin::Plugin::SPF Mail::SpamAssassin::Plugin::SpamCop Mail::SpamAssassin::Plugin::URIDNSBL Mail::SpamAssassin::Plugin::URIDetail Mail::SpamAssassin::Plugin::URIEval Mail::SpamAssassin::Plugin::VBounce Mail::SpamAssassin::Plugin::WLBLEval Mail::SpamAssassin::Plugin::WelcomeListSubject =head1 WEB SITES SpamAssassin web site: https://spamassassin.apache.org/ Wiki-based documentation: https://wiki.apache.org/spamassassin/ =head1 USER MAILING LIST A users mailing list exists where other experienced users are often able to help and provide tips and advice. Subscription instructions are located on the SpamAssassin web site. =head1 CONFIGURATION FILES The SpamAssassin rule base, text templates, and rule description text are loaded from configuration files. Default configuration data is loaded from the first existing directory in: =over 4 =item /var/lib/spamassassin/4.000000 =item /usr/share/spamassassin =item /usr/share/spamassassin =item /usr/local/share/spamassassin =item /usr/share/spamassassin =back Site-specific configuration data is used to override any values which had already been set. This is loaded from /etc/spamassassin. From those directories, SpamAssassin will first read files ending in ".pre" in lexical order and then it will read files ending in ".cf" in lexical order (most files begin with two numbers to make the sorting order obvious). In other words, it will read F<init.pre> first, then F<10_default_prefs.cf> before F<50_scores.cf> and F<20_body_tests.cf> before F<20_head_tests.cf>. Options in later files will override earlier files. Individual user preferences are loaded from the location specified on the C<spamassassin>, C<sa-learn>, or C<spamd> command line (see respective manual page for details). If the location is not specified, F<~/.spamassassin/user_prefs> is used if it exists. SpamAssassin will create that file if it does not already exist, using F<user_prefs.template> as a template. That file will be looked for in: =over 4 =item /etc/spamassassin =item /usr/etc/mail/spamassassin =item /usr/share/spamassassin =item /etc/spamassassin =item /etc/mail/spamassassin =item /usr/local/share/spamassassin =item /usr/share/spamassassin =back =head1 TAGGING The following two sections detail the default tagging and markup that takes place for messages when running C<spamassassin> or C<spamc> with C<spamd> in the default configuration. Note: before header modification and addition, all headers beginning with C<X-Spam-> are removed to prevent spammer mischief and also to avoid potential problems caused by prior invocations of SpamAssassin. =head2 TAGGING FOR SPAM MAILS By default, all messages with a calculated score of 5.0 or higher are tagged as spam. If an incoming message is tagged as spam, instead of modifying the original message, SpamAssassin will create a new report message and attach the original message as a message/rfc822 MIME part (ensuring the original message is completely preserved and easier to recover). The new report message inherits the following headers (if they are present) from the original spam message: =over 4 =item From: header =item To: header =item Cc: header =item Subject: header =item Date: header =item Message-ID: header =back The above headers can be modified if the relevant C<rewrite_header> option is given (see C<Mail::SpamAssassin::Conf> for more information). By default these message headers are added to spam: =over 4 =item X-Spam-Flag: header Set to C<YES>. =back The headers that added are fully configurable via the C<add_header> option (see C<Mail::SpamAssassin::Conf> for more information). =over 4 =item spam mail body text The SpamAssassin report is added to top of the mail message body, if the message is marked as spam. =back =head2 DEFAULT TAGGING FOR ALL MAILS These headers are added to all messages, both spam and ham (non-spam). =over 4 =item X-Spam-Checker-Version: header The version and subversion of SpamAssassin and the host where SpamAssassin was run. =item X-Spam-Level: header A series of "*" characters where each one represents a full score point. =item X-Spam-Status: header A string, C<(Yes|No), score=nn required=nn tests=xxx,xxx autolearn=(ham|spam|no|unavailable|failed)> is set in this header to reflect the filter status. For the first word, "Yes" means spam and "No" means ham (non-spam). =back The headers that added are fully configurable via the C<add_header> option (see C<Mail::SpamAssassin::Conf> for more information). =head1 INSTALLATION The B<spamassassin> command is part of the B<Mail::SpamAssassin> Perl module. Install this as a normal Perl module, using C<perl -MCPAN -e shell>, or by hand. Note that it is not possible to use the C<PERL5LIB> environment variable to affect where SpamAssassin finds its perl modules, due to limitations imposed by perl's "taint" security checks. For further details on how to install, please read the C<INSTALL> file from the SpamAssassin distribution. =head1 DEVELOPER DOCUMENTATION Mail::SpamAssassin Spam detector and markup engine Mail::SpamAssassin::ArchiveIterator find and process messages one at a time Mail::SpamAssassin::AutoWelcomelist auto-welcomelist handler for SpamAssassin Mail::SpamAssassin::Bayes determine spammishness using a Bayesian classifier Mail::SpamAssassin::BayesStore Bayesian Storage Module Mail::SpamAssassin::BayesStore::SQL SQL Bayesian Storage Module Implementation Mail::SpamAssassin::Conf::LDAP load SpamAssassin scores from LDAP database Mail::SpamAssassin::Conf::Parser parse SpamAssassin configuration Mail::SpamAssassin::Conf::SQL load SpamAssassin scores from SQL database Mail::SpamAssassin::Message decode, render, and hold an RFC-2822 message Mail::SpamAssassin::Message::Metadata extract metadata from a message Mail::SpamAssassin::Message::Node decode, render, and make available MIME message parts Mail::SpamAssassin::PerMsgLearner per-message status (spam or not-spam) Mail::SpamAssassin::PerMsgStatus per-message status (spam or not-spam) Mail::SpamAssassin::PersistentAddrList persistent address list base class Mail::SpamAssassin::Plugin SpamAssassin plugin base class Mail::SpamAssassin::Plugin::RelayCountry add message metadata indicating the country code of each relay Mail::SpamAssassin::Plugin::SPF perform SPF verification tests Mail::SpamAssassin::Plugin::URIDNSBL look up URLs against DNS blocklists Mail::SpamAssassin::SQLBasedAddrList SpamAssassin SQL Based Auto Welcomelist =head1 BUGS See <https://issues.apache.org/SpamAssassin/> =head1 AUTHORS The SpamAssassin(tm) Project <https://spamassassin.apache.org/> =head1 COPYRIGHT AND LICENSE SpamAssassin is distributed under the Apache License, Version 2.0, as described in the file C<LICENSE> included with the distribution. Copyright (C) 2015 The Apache Software Foundation