NAME

Mail::SpamAssassin - Mail::Audit spam detector plugin

SYNOPSIS

  my $mail = Mail::SpamAssassin::NoMailAudit->new();
  my $spamtest = Mail::SpamAssassin->new();
  my $status = $spamtest->check ($mail);
  if ($status->is_spam ()) {
    $status->rewrite_mail ();
    $mail->accept("spamfolder");
  } else {
    $mail->accept();            # to default incoming mailbox
  }
  ...

DESCRIPTION

Mail::SpamAssassin is a Mail::Audit plugin to identify spam using text analysis and several internet-based realtime blacklists.

Using its rule base, it uses a wide range of heuristic tests on mail headers and body text to identify ``spam'', also known as unsolicited commercial email.

Once identified, the mail can then be optionally tagged as spam for later filtering using the user's own mail user-agent application.

This module implements a Mail::Audit plugin, allowing SpamAssassin to be used in a Mail::Audit filter. If you wish to use a command-line filter tool, try the spamassassin or spamd tools provided.

SpamAssassin also includes support for reporting spam messages to collaborative filtering databases, such as Vipul's Razor ( http://razor.sourceforge.net/ ).

METHODS

$f = new Mail::SpamAssassin( [ { opt => val, ... } ] )
Constructs a new Mail::SpamAssassin object. You may pass the following attribute-value pairs to the constructor.
rules_filename
The filename to load spam-identifying rules from. (optional)

userprefs_filename
The filename to load preferences from. (optional)

userstate_dir
The directory user state is stored in. (optional)

config_text
The text of all rules and preferences. If you prefer not to load the rules from files, read them in yourself and set this instead. As a result, this will override the settings for rules_filename and userprefs_filename.

local_tests_only
If set to 1, no tests that require internet access will be performed. (default: 0)

dont_copy_prefs
If set to 1, the user preferences file will not be created if it doesn't already exist. (default: 0)

If none of rules_filename, userprefs_filename, or config_text is set, the Mail::SpamAssassin module will search for the configuration files in the usual installed locations.

$status = $f->check ($mail)
Check a mail, encapsulated in a Mail::Audit object, to determine if it is spam or not.

Returns a Mail::SpamAssassin::PerMsgStatus object which can be used to test or manipulate the mail message.

Note that the Mail::SpamAssassin object can be re-used for further messages without affecting this check; in OO terminology, the Mail::SpamAssassin object is a ``factory''. However, if you do this, be sure to call the finish() method on the status objects when you're done with them.

$status = $f->check_message_text ($mailtext)
Check a mail, encapsulated in a plain string, to determine if it is spam or not.

Otherwise identical to $f-check()> above.

$f->report_as_spam ($mail, $options)
Report a mail, encapsulated in a Mail::Audit object, as human-verified spam. This will submit the mail message to live, collaborative, spam-blocker databases, allowing other users to block this message.

Options is an optional reference to a hash of options. Currently these can be:

dont_report_to_razor
Inhibits reporting of the spam to Razor; useful if you know it's already been listed there.

$f->add_all_addresses_to_whitelist ($mail)
Given a mail message, find as many addresses in the usual headers (To, Cc, From etc.), and the message body, and add them to the automatic whitelist database.

$f->remove_all_addresses_from_whitelist ($mail)
Given a mail message, find as many addresses in the usual headers (To, Cc, From etc.), and the message body, and remove them from the automatic whitelist database.

$f->add_all_addresses_to_blacklist ($mail)
Given a mail message, find as many addresses in the usual headers (To, Cc, From etc.), and the message body, and adds them to the automatic whitelist database with a high score, effectively blacklisting them.

$f->reply_with_warning ($mail, $replysender)
Reply to the sender of a mail, encapsulated in a Mail::Audit object, explaining that their message has been added to spam-tracking databases and deleted. To be used in conjunction with report_as_spam. The $replysender argument should contain an email address to use as the sender of the reply message.

$text = $f->remove_spamassassin_markup ($mail)
Returns the text of the message, with any SpamAssassin-added text (such as the report, or X-Spam-Status headers) stripped.

$f->read_scoreonly_config ($filename)
Read a configuration file and parse only scores from it. This is used to safely allow multi-user daemons to read per-user config files without having to use setuid().

$f->load_scoreonly_sql ($username)
Read configuration paramaters from SQL database and parse scores from it. This will only take effect if the perl DBI module is installed, and the configuration parameters user_scores_dsn, user_scores_sql_username, and user_scores_sql_password are set correctly.

$f->set_persistent_address_list_factory ($factoryobj)
Set the persistent address list factory, used to create objects for the automatic whitelist algorithm's persistent-storage back-end. See Mail::SpamAssassin::PersistentAddrList for the API these factory objects must implement, and the API the objects they produce must implement.

$f->compile_now ($use_user_prefs)
Compile all patterns, load all configuration files, and load all possibly-required Perl modules.

Normally, Mail::SpamAssassin uses lazy evaluation where possible, but if you plan to fork() or start a new perl interpreter thread to process a message, this is suboptimal, as each process/thread will have to perform these actions.

Call this function in the master thread or process to perform the actions straightaway, so that the sub-processes will not have to.

If $use_user_prefs is 0, this will initialise the SpamAssassin configuration without reading the per-user configuration file and it will assume that you will call read_scoreonly_config at a later point.

$f->create_default_prefs ()
Copy default prefs file into home directory for later use and modification.

PREREQUISITES

Mail::Audit Mail::Internet

COREQUISITES

Net::DNS

MORE DOCUMENTATION

See also http://spamassassin.org/ for more information.

SEE ALSO

Mail::SpamAssassin::Conf Mail::SpamAssassin::PerMsgStatus spamassassin

AUTHOR

Justin Mason <jm /at/ jmason.org>

COPYRIGHT

SpamAssassin is distributed under Perl's Artistic license.

AVAILABILITY

The latest version of this library is likely to be available from CPAN as well as:

  http://spamassassin.org/