NAME
    FML::Filter::Header - filter based on mail header content.

SYNOPSIS
    use FML::Filter::Header; my $filter = new FML::Filter::Header; if
    (defined $filter) { my $rules =
    $config->get_as_array_ref('article_header_filter_rules'); if (defined
    $rules) { $filter->set_rules( $rules ); } $filter->header_check($mesg);
    if ($filter->error()) { ... error handling ... } }

DESCRIPTION
    "FML::Filter::Header" is the collection of filter rules based on mail
    header content.

METHODS
  new()
    constructor.

  set_rules( $rules )
    overwrite rules by specified @$rules ($rules is ARRAY_REF).

  header_check($msg);
    $msg is "Mail::Message" object.

    "Usage":

        use FML::Filter::Header;
        my $filter = new FML::Filter::Header;
        my $msg    = $curproc->incoming_message();

        $filter->header_check($msg);
        if ($filter->error()) {
           # do something for wrong formated message ...
        }

FILTER RULES
  check_message_id($msg)
    validate the message-id in the given message $msg. This routine checks
    whether the message-id has @.

  check_date($msg)
    validate the date in the given message $msg. This routine checks if the
    header has no date field or not.

CODING STYLE
    See "http://www.fml.org/software/FNF/" on fml coding style guide.

AUTHOR
    Ken'ichi Fukamachi

COPYRIGHT
    Copyright (C) 2001,2002,2003,2004,2005,2007,2008 Ken'ichi Fukamachi

    All rights reserved. This program is free software; you can redistribute
    it and/or modify it under the same terms as Perl itself.

HISTORY
    FML::Filter::Header first appeared in fml8 mailing list driver package.
    See "http://www.fml.org/" for more details.