1 # Copyright (C) 2013-2015 all contributors <meta@public-inbox.org>
2 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
4 # For the -mda script (mail delivery agent)
5 package PublicInbox::MDA;
10 use Date::Parse qw(strptime);
11 use constant MAX_SIZE => 1024 * 500; # same as spamc default, should be tunable
12 use constant MAX_MID_SIZE => 244; # max term size - 1 in Xapian
13 use constant cmd => qw/ssoma-mda -1/;
15 # drop plus addressing for matching
18 $str_addr =~ s/\+.*\@/\@/;
22 # do not allow Bcc, only Cc and To if recipient is set
24 my ($klass, $filter, $address) = @_;
25 my Email::Simple $simple = $filter->simple;
26 my @mid = $simple->header('Message-ID');
27 return 0 if scalar(@mid) != 1;
29 return 0 if (length($mid) > MAX_MID_SIZE);
30 return 0 unless usable_str(length('<m@h>'), $mid) && $mid =~ /\@/;
31 return 0 unless usable_str(length('u@h'), $filter->from);
32 return 0 unless usable_str(length(':o'), $simple->header("Subject"));
33 return 0 unless usable_date($simple->header("Date"));
34 return 0 if length($simple->as_string) > MAX_SIZE;
35 alias_specified($filter, $address);
40 defined($str) && length($str) >= $len;
44 my @t = eval { strptime(@_) };
49 my ($filter, $address) = @_;
51 my @address = ref($address) eq 'ARRAY' ? @$address : ($address);
53 my @recip = Email::Address->parse($_);
54 lc(__drop_plus($recip[0]->address)) => 1;
57 foreach my $line ($filter->cc, $filter->to) {
58 foreach my $addr (Email::Address->parse($line)) {
59 if ($ok{lc(__drop_plus($addr->address))}) {
67 sub set_list_headers {
68 my ($class, $simple, $dst) = @_;
69 unless (defined $simple->header('List-Id')) {
70 my $pa = $dst->{-primary_address};
71 $simple->header_set("List-Id", "<$pa>"); # RFC2919
74 foreach my $h (qw(delivered-to), # prevent training loops
75 # The rest are taken from Mailman 2.1.15
76 # could contain passwords:
77 qw(approved approve x-approved x-approve urgent),
78 # could be used phishing:
79 qw(return-receipt-to disposition-notification-to
80 x-confirm-reading-to),
83 $simple->header_set($h);
87 # returns a 3-element array: name, email, date
89 my ($class, $mime) = @_;
91 my $from = $mime->header('From');
92 my @from = Email::Address->parse($from);
93 my $name = $from[0]->name;
94 my $email = $from[0]->address;
95 ($name, $email, $mime->header('Date'));