65 lines
1.8 KiB
Perl
65 lines
1.8 KiB
Perl
#! perl
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=head1 NAME
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check_badmailfromto - checks the badmailfromto config
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=head1 DESCRIPTION
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Much like the similar check_badmailfrom, this plugin references both the
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FROM: and TO: lines, and if they both are present in the badmailfromto
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config file (a tab delimited list of FROM/TO pairs), then the message is
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blocked as if the recipient (TO) didn't exist. This is specifically designed
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to not give the impression that the sender is blocked (good for cases of
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harassment).
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Based heavily on check_badmailfrom.
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=cut
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sub register {
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my ($self, $qp) = @_;
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$self->register_hook("mail", "mail_handler");
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$self->register_hook("rcpt", "rcpt_handler");
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}
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sub mail_handler {
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my ($self, $transaction, $sender) = @_;
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my @badmailfromto = $self->qp->config("badmailfromto")
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or return (DECLINED);
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return (DECLINED) unless ($sender->format ne "<>"
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and $sender->host && $sender->user);
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my $host = lc $sender->host;
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my $from = lc($sender->user) . '@' . $host;
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for my $bad (@badmailfromto) {
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$bad =~ s/^\s*(\S+).*/$1/;
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next unless $bad;
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$bad = lc $bad;
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$self->log(LOGWARN, "Bad badmailfromto config: No \@ sign in $bad") and next unless $bad =~ m/\@/;
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$transaction->notes('badmailfromto', "$bad")
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if ($bad eq $from)
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|| (substr($bad,0,1) eq '@' && $bad eq "\@$host");
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}
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return (DECLINED);
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}
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sub rcpt_handler {
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my ($self, $transaction, $rcpt) = @_;
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my $recipient = lc($rcpt->user) . '@' . lc($rcpt->host);
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my $sender = $transaction->notes('badmailfromto');
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if ($sender) {
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my @badmailfromto = $self->qp->config("badmailfromto")
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or return (DECLINED);
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foreach (@badmailfromto) {
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my ($from, $to) = m/^\s*(\S+)\t(\S+).*/;
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return (DENY, "mail to $recipient not accepted here")
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if lc($from) eq $sender and lc($to) eq $recipient;
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}
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}
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return (DECLINED);
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}
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