Change no hostname to a hostile action, there has been too many of them, and I have no idea what they are trying to do:)

lib/exim_parser.pm

@@ -99,7 +99,11 @@ sub parser {
 	} elsif($string =~ m/ no host name found for IP address /) {
 		$_		= $string;
 		$reply		= 'No hostname';
-		$hostile	= 0;
+		$hostile	= 1;
+		PARSE:
+			m/\ ($re_host)/gcix && do {
+				$host	= $1;
+			};
 	} elsif($string =~ m/unexpected disconnection while reading SMTP command from/) {
 		$_		= $string;
 		$reply		= 'SMTP error, disconnected';