[Mimedefang] Block all DOS EXEs

[Frank Doepper]

Hi,

FYI, here you can see how I block all EXE attachments not by name, but by
content. Within filter():

    if ($type ne "text/plain") {
      my $body=$entity->bodyhandle;
      if ($body) {
        my $B=$body->open("r");
        my $exe="";
        $B->read($exe,2);
        $B->close;
        if ($exe eq "MZ") {
          md_log("EXE",$fname,$RelayAddr);
          return action_bounce("Mail rejected: DOS EXEcutable found.");
        }
      }
    }

-- 
Frank Doepper taz-EDV +49-30-25902-307