diff -up logwatch-7.3.6/scripts/services/postfix.lost-connection logwatch-7.3.6/scripts/services/postfix
--- logwatch-7.3.6/scripts/services/postfix.lost-connection	2009-12-16 12:06:01.208255271 +0100
+++ logwatch-7.3.6/scripts/services/postfix	2009-12-16 12:06:17.115378576 +0100
@@ -1536,7 +1536,7 @@ while ( <> ) {
    # end of $re_QID section
 
    # see also ConnectionLost in $re_QID section
-   elsif ( ($reason,$host,$hostip) = ($p1 =~ /lost connection (after [^ ]*) (\(\d+ bytes\) )?from ([^[]*)\[($re_IP|unknown)\]$/o )) {
+   elsif ( ($reason,$host,$hostip) = ($p1 =~ /lost connection (after [^ ]*) (?:\(\d+ bytes\) )?from ([^[]*)\[($re_IP|unknown)\]$/o )) {
       unless ($hostip =~ /unknown/) {
          #TD lost connection after DATA (0 bytes) from mail.example.com[192.168.0.1]    
          #TD lost connection after CONNECT from mail.example.com[192.168.0.1]