+# List-ID based delivery
+{
+ local $ENV{PI_EMERGENCY} = $faildir;
+ local $ENV{HOME} = $home;
+ local $ENV{ORIGINAL_RECIPIENT} = undef;
+ local $ENV{PATH} = $main_path;
+ my $list_id = 'foo.example.com';
+ my $mid = 'list-id-delivery@example.com';
+ my $simple = Email::Simple->new(<<EOF);
+From: user <user\@example.com>
+To: You <you\@example.com>
+Cc: $addr
+Message-ID: <$mid>
+List-Id: <$list_id>
+Subject: this message will be trained as spam
+Date: Thu, 01 Jan 1970 00:00:00 +0000
+
+EOF
+ system(qw(git config --file), $pi_config, "$cfgpfx.listid", $list_id);
+ $? == 0 or die "failed to set listid $?";
+ my $in = $simple->as_string;
+ IPC::Run::run([$mda], \$in);
+ is($?, 0, 'mda OK with List-Id match');
+ my $path = mid2path($mid);
+ my $msg = `git --git-dir=$maindir cat-file blob HEAD:$path`;
+ like($msg, qr/\Q$list_id\E/, 'delivered message w/ List-ID matches');
+
+ # try a message w/o precheck
+ $simple = Email::Simple->new(<<EOF);
+To: You <you\@example.com>
+List-Id: <$list_id>
+
+this message would not be accepted without --no-precheck
+EOF
+ $in = $simple->as_string;
+ my ($out, $err) = ('', '');
+ IPC::Run::run([$mda, '--no-precheck'], \$in, \$out, \$err);
+ is($?, 0, 'mda OK with List-Id match and --no-precheck');
+ my $cur = `git --git-dir=$maindir diff HEAD~1..HEAD`;
+ like($cur, qr/this message would not be accepted without --no-precheck/,
+ '--no-precheck delivered message anyways');
+}
+