# If explicit old-style ones are specified, they trump --suppress-cc.
 $suppress_cc{'self'} = $suppress_from if defined $suppress_from;
-$suppress_cc{'sob'} = $signed_off_cc if defined $signed_off_cc;
+$suppress_cc{'sob'} = !$signed_off_cc if defined $signed_off_cc;
 
 # Debugging, print out the suppressions.
 if (0) {
                        $message .=  $_;
                        if (/^(Signed-off-by|Cc): (.*)$/i) {
                                next if ($suppress_cc{'sob'});
+                               chomp;
                                my $c = $2;
                                chomp $c;
                                next if ($c eq $sender and $suppress_cc{'self'});