5 =head1 NAME $RCSfile: maps,v $
7 This script filters mail based on the files nulllist, blacklist and whitelist.
8 Input is an email message. This script extracts the From line and then parses
9 the email address. If the email is from a sender who should be /dev/null'ed
10 (e.g. bounce messages from mail daemons) the message will be discarded. If the
11 sender is on the blacklist then a message is sent back informing the sender that
12 he's been blacklisted. If the sender is on the white list then the email is
13 appended to the mail drop file. Otherwise a message is sent back informing the
14 sender that in order to successfully send email the sender must register for the
15 permission to do so, along with a URL that allows the sender to sign up.
23 Andrew DeFaria <Andrew@DeFaria.com>
31 Fri Nov 29 14:17:21 2002
35 $Date: 2013/06/12 14:05:47 $
41 Usage maps: [-u|ser <username>] [-ve|rbose] [-deb|ug] [-e|xecute]
44 -u|ser <username>: Set context to this username
47 -de|bug: Output debug messages
49 -[no]e|xecute: Set execute mode.
51 # (c) Copyright 2000-2021, Andrew@DeFaria.com, all rights reserved.
61 use File::Temp qw (tempfile);
62 use Net::Domain qw (hostdomain);
64 use lib "$FindBin::Bin/../lib";
65 use lib "$FindBin::Bin/../../lib";
75 my $userid = $ENV{USER};
77 # For some reason I'm not parsing messages correctly but it only seems to
78 # happen when the message is piped in from the MTA. This routine will
79 # temporarily save the messages in a file.
82 my $msgfile = tempfile ();
84 # Read STDIN and write it out to the tempfile
89 # Seek to the start of the file (Note if we closed it, it would be deleted)
92 # Return the filehandle
96 sub ValidDomainUser($) {
99 my ($username, $domainname);
101 if ($sender =~ /(.*)\@(.*)/) {
108 return 1 if $domainname ne hostdomain;
110 # Let BICE email come through
111 return 1 if $username eq "bice";
113 my $uid = getpwnam $username;
115 return defined $uid ? 1 : 0;
118 sub ProcessMsgs ($$$) {
119 my ($msgfile, $username, $user_email) = @_;
121 return unless $execute;
123 while (!eof *$msgfile) {
124 my ($sender, $sender_long, $reply_to, $subject, $data) = ReadMsg (*$msgfile);
126 my ($onlist, $rule, $sequence, $hit_count);
128 # Algorithm change: We now first check to see if the sender is not found
129 # in the message and skip it if so. Then we handle if we are the sender
130 # and that the from address is formatted properly. Spammers often use
131 # the senders email address (i.e. andrew@defaria.com) as their from address
132 # so we check "Andrew DeFaria <Andrew@DeFaria.com>", which they have never
133 # forged. This catches a lot of spam actually.
135 # Next we check to see if the sender is on our whitelist. If so then we let
136 # them in. This allows us to say whitelist josephrosenberg@hotmail.com while
137 # still nulllisting all of the other hotmail.com spammers.
139 # Next we process blacklisted people as they are also of high priority.
141 # Then we process nulllist people.
143 # Finally, we handle return processing
145 # Discard any email with an invalid email address
146 next unless Email::Valid->address($sender);
148 if ($sender eq $user_email and
149 (lc ($sender_long) !~ lc ("\"$username\" <$user_email>") and
150 lc ($sender_long) !~ lc ("$username <$user_email>"))) {
151 verbose "Nulllisting message from sender ($sender_long) pretending to be $user_email";
157 ($onlist, $rule, $sequence, $hit_count) = OnWhitelist $sender;
160 if (ValidDomainUser $sender) {
161 verbose "Whitelisting $sender";
162 Whitelist $sender, $data, $sequence, $hit_count;
164 verbose "Sender from this domain but user not found";
172 ($onlist, $rule, $sequence, $hit_count) = OnBlacklist $sender;
175 verbose "Blacklisting $sender";
180 sequence => $sequence,
181 hit_count => $hit_count,
189 ($onlist, $rule, $sequence, $hit_count) = OnNulllist $sender;
192 verbose "Nulllisting $sender";
193 Nulllist $sender, $sequence, $hit_count;
198 verbose "Returning message from $sender";
202 reply_to => $reply_to,
211 'user=s' => \$userid,
212 'verbose' => sub { set_verbose },
213 'debug' => sub { set_debug },
214 'execute!' => \$execute,
219 if ($ARGV[0] and $ARGV[0] ne "") {
220 open $msgfile, '<', $ARGV[0];
223 Error "Unable to open file ($ARGV[0]): $!\n";
227 $msgfile = SaveStdin;
230 verbose "Starting MAPS....";
232 my %userOptions = SetContext $userid
233 or die "$userid is not a registered MAPS user\n";
235 ProcessMsgs $msgfile, $userOptions{name}, $userOptions{email};