A listing is automatically expires after a certain amount of time if no more malware comes from a host.

The exact expiration time depends on many factors, such as:

  • How important is that host to Hungarian mail servers
  • How long it has already been listed before
  • How many times it has been relisted
  • How many malware we get from it
  • How many listed hosts reside in its subnet
  • And others

The expiration times are not made public.

Hosts can be manually delisted prior expiration, but they get listed again if their behavior doesn't change.