95 lines
2.4 KiB
Perl
95 lines
2.4 KiB
Perl
#!perl -w
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use Qpsmtpd::Plugin::Async::DNSBLBase;
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sub init {
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my $self = shift;
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my $class = ref $self;
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no strict 'refs';
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push @{"${class}::ISA"}, 'Qpsmtpd::Plugin::Async::DNSBLBase';
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}
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sub hook_mail {
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my ($self, $transaction, $sender) = @_;
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my $class = ref $self;
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return DECLINED if $sender->format eq '<>';
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my %rhsbl_zones =
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map { (split /\s+/, $_, 2)[0, 1] } $self->qp->config('rhsbl_zones');
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return DECLINED unless %rhsbl_zones;
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my $sender_host = $sender->host;
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my @A_zones = grep { defined($rhsbl_zones{$_}) } keys %rhsbl_zones;
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my @TXT_zones = grep { !defined($rhsbl_zones{$_}) } keys %rhsbl_zones;
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if (@A_zones) {
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# message templates for responding to the client
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$transaction->notes(rhsbl_templates =>
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{map { +"$sender_host.$_" => $rhsbl_zones{$_} } @A_zones});
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}
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return DECLINED
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unless $class->lookup($self->qp,
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[map { "$sender_host.$_" } @A_zones],
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[map { "$sender_host.$_" } @TXT_zones],
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);
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return YIELD;
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}
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sub process_a_result {
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my ($class, $qp, $result, $query) = @_;
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my $transaction = $qp->transaction;
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$transaction->notes('rhsbl',
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$transaction->notes('rhsbl_templates')->{$query})
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unless $transaction->notes('rhsbl');
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}
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sub process_txt_result {
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my ($class, $qp, $result, $query) = @_;
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my $transaction = $qp->transaction;
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$transaction->notes('rhsbl', $result) unless $transaction->notes('rhsbl');
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}
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sub hook_rcpt {
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my ($self, $transaction, $rcpt) = @_;
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my $host = $transaction->sender->host;
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my $note = $transaction->notes('rhsbl');
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return (DENY, "Mail from $host rejected because it $note") if $note;
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return DECLINED;
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}
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1;
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=head1 NAME
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rhsbl - handle RHSBL lookups
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=head1 DESCRIPTION
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Pluging that checks the host part of the sender's address against a
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configurable set of RBL services.
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=head1 CONFIGURATION
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This plugin reads the lists to use from the rhsbl_zones configuration
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file. Normal domain based dns blocking lists ("RBLs") which contain TXT
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records are specified simply as:
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dsn.rfc-ignorant.org
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To configure RBL services which do not contain TXT records in the DNS,
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but only A records, specify, after a whitespace, your own error message
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to return in the SMTP conversation e.g.
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abuse.rfc-ignorant.org does not support abuse@domain
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=cut
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