I host many websites and today a client got black listed and they were unable to send bids and invoices to clients that use SPAMHAUS.ORG to blacklist spamming domains. Spamhaus has no tech number, no email, no "dispute channel and are in the UK, not able to be called to ask WHY and have a WRONGFULLY blacklisted domain removed from their domain blacklist. These people are NOT professional and should not be used.