+=head2 _HandleMachineGeneratedMail
+
+Takes named params:
+ Message
+ ErrorsTo
+ Subject
+
+Checks the message to see if it's a bounce, if it looks like a loop, if it's autogenerated, etc.
+Returns a triple of ("Should we continue (boolean)", "New value for $ErrorsTo", "Status message",
+"This message appears to be a loop (boolean)" );
+
+=cut
+
+sub _HandleMachineGeneratedMail {
+ my %args = ( Message => undef, ErrorsTo => undef, Subject => undef, MessageId => undef, @_ );
+ my $head = $args{'Message'}->head;
+ my $ErrorsTo = $args{'ErrorsTo'};
+
+ my $IsBounce = CheckForBounce($head);
+
+ my $IsAutoGenerated = CheckForAutoGenerated($head);
+
+ my $IsSuspiciousSender = CheckForSuspiciousSender($head);
+
+ my $IsALoop = CheckForLoops($head);
+
+ my $SquelchReplies = 0;
+
+ #If the message is autogenerated, we need to know, so we can not
+ # send mail to the sender
+ if ( $IsBounce || $IsSuspiciousSender || $IsAutoGenerated || $IsALoop ) {
+ $SquelchReplies = 1;
+ $ErrorsTo = $RT::OwnerEmail;
+ }
+
+ # Warn someone if it's a loop, before we drop it on the ground
+ if ($IsALoop) {
+ $RT::Logger->crit("RT Received mail (".$args{MessageId}.") from itself.");
+
+ #Should we mail it to RTOwner?
+ if ($RT::LoopsToRTOwner) {
+ MailError(
+ To => $RT::OwnerEmail,
+ Subject => "RT Bounce: ".$args{'Subject'},
+ Explanation => "RT thinks this message may be a bounce",
+ MIMEObj => $args{Message}
+ );
+ }
+
+ #Do we actually want to store it?
+ return ( 0, $ErrorsTo, "Message Bounced", $IsALoop ) unless ($RT::StoreLoops);
+ }
+
+ # Squelch replies if necessary
+ # Don't let the user stuff the RT-Squelch-Replies-To header.
+ if ( $head->get('RT-Squelch-Replies-To') ) {
+ $head->add(
+ 'RT-Relocated-Squelch-Replies-To',
+ $head->get('RT-Squelch-Replies-To')
+ );
+ $head->delete('RT-Squelch-Replies-To');
+ }
+
+ if ($SquelchReplies) {
+
+ # Squelch replies to the sender, and also leave a clue to
+ # allow us to squelch ALL outbound messages. This way we
+ # can punt the logic of "what to do when we get a bounce"
+ # to the scrip. We might want to notify nobody. Or just
+ # the RT Owner. Or maybe all Privileged watchers.
+ my ( $Sender, $junk ) = ParseSenderAddressFromHead($head);
+ $head->add( 'RT-Squelch-Replies-To', $Sender );
+ $head->add( 'RT-DetectedAutoGenerated', 'true' );
+ }
+ return ( 1, $ErrorsTo, "Handled machine detection", $IsALoop );