61 lines
1.6 KiB
Perl
61 lines
1.6 KiB
Perl
# -*- perl -*-
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=head1 NAME
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check_badmailfrom - checks the standard badmailfrom config
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=head1 DESCRIPTION
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Reads the "badmailfrom" configuration like qmail-smtpd does. From the
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qmail-smtpd docs:
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"Unacceptable envelope sender addresses. qmail-smtpd will reject every
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recipient address for a message if the envelope sender address is
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listed in badmailfrom. A line in badmailfrom may be of the form
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@host, meaning every address at host."
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=head1 NOTES
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According to the SMTP protocol, we can't reject until after the RCPT
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stage, so store it until later.
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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 @badmailfrom = $self->qp->config("badmailfrom")
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or return (DECLINED);
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return (DECLINED) unless ($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 $bad (@badmailfrom) {
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$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 badmailfrom config: No \@ sign in $bad") and next unless $bad =~ m/\@/;
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$transaction->notes('badmailfrom', "sorry, your envelope sender is in my badmailfrom list")
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if ($bad eq $from) || (substr($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 $note = $transaction->notes('badmailfrom');
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if ($note) {
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$self->log(LOGINFO, $note);
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return (DENY, $note);
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}
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return (DECLINED);
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}
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