Mail::Message::Head::SpamGroup(3pm)

NAME
Mail::Message::Head::SpamGroup - spam fighting related header fields

INHERITANCE
 Mail::Message::Head::SpamGroup
   is a Mail::Message::Head::FieldGroup
   is a Mail::Reporter

SYNOPSIS
  my $sg = Mail::Message::Head::SpamGroup->new(head => $head, ...);
  $head->addSpamGroup($sg);

  my $sg = $head->addSpamGroup( <options> );
  $sg->delete;

  my @sgs = $head->spamGroups;

DESCRIPTION
A spam group is a set of header fields which are added by spam detection and spam fighting software. This class knows various details about that software.

Extends "DESCRIPTION" in Mail::Message::Head::FieldGroup.

METHODS
Extends "METHODS" in Mail::Message::Head::FieldGroup.

  Constructors
Extends "Constructors" in Mail::Message::Head::FieldGroup.

$obj->clone()
    Inherited, see "Constructors" in Mail::Message::Head::FieldGroup

$any->fighter($name, %options)
    Get the settings of a certain spam-fighter, optionally after setting them. The knownFighters() method returns the defined names. The names are case-sensitive.

    The %options are all passed as settings to the spamfilter, except the few which are listed here specifically.

     -Option --Default
      fields   <required>
      isspam   <required>
      version  undef

    fields => REGEXP
        The regular expression which indicates which of the header fields are added by the spam fighter software.

    isspam => CODE
        The CODE must return "true" or "false", to indicate whether the spam fighter thinks that the message contains spam. The CODE ref is called with the spamgroup object (under construction) and the header which is inspected.

    version => CODE
        Can be called to collect the official name and the version of the software which is used to detect spam. The CODE ref is called with the spamgroup object (under construction) and the header which is inspected.

    » example: adding your own spam-fighter definitions

      Mail::Message::Head::SpamGroup->fighter( 'MY-OWN',
         fields => qw/^x-MY-SPAM-DETECTOR-/,
         isspam => sub { my ($sg, $head) = @_; $head->fields > 100 },
      );

$obj->from($head|$message, %options)
    Returns a list of "Mail::Message::Head::SpamGroup" objects, based on the specified $message or message $head. Improves base, see "Constructors" in Mail::Message::Head::FieldGroup

     -Option--Default
      types   undef

    types => ARRAY-OF-NAMES
        Only the specified types will be tried. If the ARRAY is empty, an empty list is returned. Without this option, all sets are returned.

$any->habeasSweFieldsCorrect( [$message|$head] )
    Returns a "true" value if the $message or $head contains "Habeas-SWE" fields which are correct. Without argument, this is used as instance method on an existing Spam-Group.

    » example: checking Habeas-SWE fields

      if(Mail::Message::Head::SpamGroup->habeasSweFieldsCorrect($message))
      {   $message->label(spam => 0);
      }

      my $sg = $message->head->spamGroups('Habeas-SWE');
      if($sg->habeasSweFieldsCorrect) { ... };

      use List::Util 'first';
      if(first {$_->habeasSweFieldsCorrect} $head->spamGroups)
      {   ...
      }

$any->implementedTypes()
    Inherited, see "Constructors" in Mail::Message::Head::FieldGroup

$any->isSpamGroupFieldName($name)

$any->knownFighters()
    Returns an unsorted list of all names representing pre-defined spam-fighter software. You can ask details about them, and register more fighters with the fighter() method.

$class->new($fields, %options)
    Construct an object which maintains one set of fields which were added by spam fighting software. Improves base, see "Constructors" in Mail::Message::Head::FieldGroup

     -Option  --Defined in                     --Default
      head      Mail::Message::Head::FieldGroup  undef
      software  Mail::Message::Head::FieldGroup  undef
      type      Mail::Message::Head::FieldGroup  undef
      version   Mail::Message::Head::FieldGroup  undef

    head => $head
    software => STRING
    type => STRING
    version => STRING
$obj->spamDetected( [BOOLEAN] )
    Returns (after setting) whether this group of spam headers thinks that this is spam. See Mail::Message::Head::Complete::spamDetected().

    » example:

      die if $head->spamDetected;

      foreach my $sg ($head->spamGroups)
      {   print $sg->type." found spam\n" if $sg->spamDetected;
      }

  Attributes
Extends "Attributes" in Mail::Message::Head::FieldGroup.

  The header
Extends "The header" in Mail::Message::Head::FieldGroup.

$obj->add( <$field, $value> | $object )
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

$obj->addFields( [$fieldnames] )
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

$obj->attach($head)
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

$obj->delete()
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

$obj->fieldNames()
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

$obj->fields()
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

$obj->head()
    Inherited, see "The header" in Mail::Message::Head::FieldGroup

  Access to the header
Extends "Access to the header" in Mail::Message::Head::FieldGroup.

$obj->software()
    Inherited, see "Access to the header" in Mail::Message::Head::FieldGroup

$obj->type()
    Inherited, see "Access to the header" in Mail::Message::Head::FieldGroup

$obj->version()
    Inherited, see "Access to the header" in Mail::Message::Head::FieldGroup

  Internals
Extends "Internals" in Mail::Message::Head::FieldGroup.

$obj->collectFields( [$name] )
    Inherited, see "Internals" in Mail::Message::Head::FieldGroup

$obj->detected($type, $software, $version)
    Inherited, see "Internals" in Mail::Message::Head::FieldGroup

  Error handling
Extends "Error handling" in Mail::Message::Head::FieldGroup.

$obj->AUTOLOAD()
    Inherited, see "Error handling" in Mail::Reporter

$obj->details()
    Inherited, see "Error handling" in Mail::Message::Head::FieldGroup

$obj->notImplemented()
    Inherited, see "Error handling" in Mail::Reporter

$obj->print( [$fh] )
    Inherited, see "Error handling" in Mail::Message::Head::FieldGroup

  Cleanup
Extends "Cleanup" in Mail::Message::Head::FieldGroup.

$obj->DESTROY()
    Inherited, see "Cleanup" in Mail::Reporter

DIAGNOSTICS

Error: class $package does not implement method $method.
    Fatal error: the specific $package (or one of its superclasses) does not implement this method where it should. This message means that some other related classes do implement this method however the class at hand does not. Probably you should investigate this and probably inform the author of the package. Cast by notImplemented()

SEE ALSO
This module is part of Mail-Message version 4.03, built on January 26, 2026. Website: http://perl.overmeer.net/CPAN/

LICENSE
For contributors see file ChangeLog.

This software is copyright (c) 2001-2026 by Mark Overmeer.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.