1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
#!/usr/bin/perl -w
# Copyright (C) 2013-2015 all contributors <meta@public-inbox.org>
# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
#
# Mail delivery agent for public-inbox, run from your MTA upon mail delivery
use strict;
use warnings;
my $usage = 'public-inbox-mda < rfc2822_message';
use Email::Filter;
use Email::MIME;
use File::Path::Expand qw/expand_filename/;
use IPC::Run qw(run);
use PublicInbox::MDA;
use PublicInbox::Filter;
use PublicInbox::Config;
use PublicInbox::Import;
use PublicInbox::Git;
# n.b: hopefully we can setup the emergency path without bailing due to
# user error, we really want to setup the emergency destination ASAP
# in case there's bugs in our code or user error.
my $emergency = $ENV{PI_EMERGENCY} || '~/.public-inbox/emergency/';
$emergency = expand_filename($emergency);
# this reads the message from stdin
my $filter = Email::Filter->new(emergency => $emergency);
my $config = PublicInbox::Config->new;
my $recipient = $ENV{ORIGINAL_RECIPIENT};
defined $recipient or die "ORIGINAL_RECIPIENT not defined in ENV\n";
my $dst = $config->lookup($recipient); # first check
defined $dst or exit(1);
my $main_repo = $dst->{mainrepo} or exit(1);
my $filtered; # string dest
if (PublicInbox::MDA->precheck($filter, $dst->{address}) &&
do_spamc($filter->simple, \$filtered)) {
# update our message with SA headers (in case our filter rejects it)
my $msg = Email::MIME->new(\$filtered);
$filtered = undef;
$filter->simple($msg);
my $filter_arg;
my $fcfg = $dst->{filter};
if (!defined $fcfg || $filter eq 'reject') {
$filter_arg = $filter;
} elsif ($fcfg eq 'scrub') {
$filter_arg = undef; # the default for legacy versions
} else {
warn "publicinbox.$dst->{name}.filter=$fcfg invalid\n";
warn "must be either 'scrub' or 'reject' (the default)\n";
}
if (PublicInbox::Filter->run($msg, $filter_arg)) {
# run spamc again on the HTML-free message
if (do_spamc($msg, \$filtered)) {
$msg = Email::MIME->new(\$filtered);
PublicInbox::MDA->set_list_headers($msg, $dst);
$filter->simple($msg);
END {
index_sync($main_repo) if ($? == 0);
};
my $git = PublicInbox::Git->new($main_repo);
my $im = PublicInbox::Import->new($git,
$dst->{name}, $recipient);
if (defined $im->add($msg)) {
$im->done;
$filter->ignore; # exits
}
# this message is similar to what ssoma-mda shows:
print STDERR "CONFLICT: Message-ID: ",
$msg->header_obj->header_raw('Message-ID'),
" exists\n";
}
}
} else {
# Ensure emergency spam gets spamassassin headers.
# This makes it easier to prioritize obvious spam from less obvious
if (defined($filtered) && $filtered ne '') {
my $drop = Email::MIME->new(\$filtered);
$filtered = undef;
$filter->simple($drop);
}
}
exit 0; # goes to emergency
# we depend on "report_safe 0" in /etc/spamassassin/*.cf with --headers
# not using Email::Filter->pipe here since we want the stdout of
# the command even on failure (spamc will set $? on error).
sub do_spamc {
my ($msg, $out) = @_;
eval {
my $orig = $msg->as_string;
run([qw/spamc -E --headers/], \$orig, $out);
};
return ($@ || $? || !defined($$out) || $$out eq '') ? 0 : 1;
}
sub index_sync {
my ($git_dir) = @_;
eval {
require PublicInbox::SearchIdx;
PublicInbox::SearchIdx->new($git_dir, 2)->index_sync;
};
}
|