deliver()
  A scanner to force sending some viruses/spams to original recipients.
  
  This scanner can be used to send some viruses/spams.
  You can define by regular expression, what virus name or spam
  can be sent. By default all non empty virus names will be matched.
  
  Usage: deliver(deliver_pattern, scanners)
  
  Where: deliver_pattern is an regular expression, which defines
           virus name to really deliver, other emails will not be delivered.
  
  For compatibility issues deliver_pattern is used as fist scanner,
  if it's type is not string. Also suboption .onlyif(pattern) can
  be used to define deliver_pattern.