diff -Nur qpsmtpd-0.84/lib/Qpsmtpd/SMTP.pm qpsmtpd-0.84_bz8051/lib/Qpsmtpd/SMTP.pm
--- qpsmtpd-0.84/lib/Qpsmtpd/SMTP.pm	2013-12-09 16:48:41.511826851 +0100
+++ qpsmtpd-0.84_bz8051/lib/Qpsmtpd/SMTP.pm	2013-12-09 16:49:44.876816250 +0100
@@ -644,7 +644,7 @@
   while (defined($_ = $self->getline($timeout))) {
     if ( $_ eq ".\r\n" ) {
         $complete++;
-        $_ eq '';
+        $_ = '';
     };
     $i++;