Have you leased a VPS, Dedicated Server or Colocation and find that your IP is listed on Spamhaus?
Don't worry you can always work directly with Spamhaus to get that IP removed. Most companies now
days are no longer providing clean IPs due to high volume of spamming clients. This has created a
headache but you can always work with your provider and the below link to help remove and clean IPs.
Thank you,
Cloudnium Support Team