File Coverage

lib/Sisimai/Lhost/X6.pm

Criterion	Covered	Total	%
statement	43	45	95.5
branch	13	18	72.2
condition	5	7	71.4
subroutine	6	6	100.0
pod	2	2	100.0
total	69	78	88.4

package Sisimai::Lhost::X6;
use parent 'Sisimai::Lhost';
use feature ':5.10';
use strict;
use warnings;

sub description { 'Unknown MTA #6' }
sub make {
    # Detect an error from Unknown MTA #6
    # @param    [Hash] mhead    Message headers of a bounce email
    # @param    [String] mbody  Message body of a bounce email
    # @return   [Hash]          Bounce data list and message/rfc822 part
    # @return   [Undef]         failed to parse or the arguments are missing
    # @since v4.25.6
    my $class = shift;
    my $mhead = shift // return undef;
    my $mbody = shift // return undef;
    return undef unless index($mhead->{'subject'}, 'There was an error sending your mail') == 0;

    state $indicators = __PACKAGE__->INDICATORS;
    state $rebackbone = qr/^The attachment contains the original mail headers.+$/m;
    state $markingsof = { 'message' => qr/\A\d+[ ]*error[(]s[)]:/ };

    my $dscontents = [__PACKAGE__->DELIVERYSTATUS];
    my $emailsteak = Sisimai::RFC5322->fillet($mbody, $rebackbone);
    my $readcursor = 0;     # (Integer) Points the current cursor position
    my $recipients = 0;     # (Integer) The number of 'Final-Recipient' header
    my $v = undef;

    for my $e ( split("\n", $emailsteak->[0]) ) {
        # Read error messages and delivery status lines from the head of the email
        # to the previous line of the beginning of the original message.
        unless( $readcursor ) {
            # Beginning of the bounce message or message/delivery-status part
            $readcursor |= $indicators->{'deliverystatus'} if $e =~ $markingsof->{'message'};
            next;
        }
        next unless $readcursor & $indicators->{'deliverystatus'};
        next unless length $e;

        # 1 error(s):
        #
        # SMTP Server  rejected recipient
        #   (Error following RCPT command). It responded as follows: [550 5.1.1 User unknown]
        $v = $dscontents->[-1];
        if( $e =~ /<([^ @]+[@][^ @]+)>/ || $e =~ /errors:[ ]*([^ ]+[@][^ ]+)/ ) {
            # SMTP Server  rejected recipient
            # The following recipients returned permanent errors: [e-mail].
            if( $v->{'recipient'} ) {
                # There are multiple recipient addresses in the message body.
                push @$dscontents, __PACKAGE__->DELIVERYSTATUS;
                $v = $dscontents->[-1];
            }
            $v->{'recipient'} = Sisimai::Address->s3s4($1);
            $v->{'diagnosis'} = $e;
            $recipients++;
        }
    }
    return undef unless $recipients;

    for my $e ( @$dscontents ) {
        # Get the last SMTP command from the error message
        if( $e->{'diagnosis'} =~ /\b(HELO|EHLO|MAIL|RCPT|DATA)\b/ ) {
            # ...(Error following RCPT command).
            $e->{'command'} = $1;
        }
        $e->{'diagnosis'} = Sisimai::String->sweep($e->{'diagnosis'});
    }
    return { 'ds' => $dscontents, 'rfc822' => $emailsteak->[1] };
}

1;
__END__