Frequently asked questions

What is CSS? Misconfigured SMTP servers (general) Why is my IP address listed in CSS? Removing an IP listed in CSS

What is the eXploits Blocklist (XBL)? Why was my IP listed in the Exploits Blocklist (XBL)? I delisted my IP, but it keeps getting listed again. Why? I get error messages that I'm blocked by XBL, but when I check my IP on your site it's not listed. Why?

How can I change the notification email address on my account? What is the Reputation Portal? How do I use the Reputation Portal? How can I get regular updates of new listings? How do I add or delete ranges from my network?

Listing Criteria for inclusion in the Spamhaus Blocklist (SBL) Is my IP listed in Spamhaus Blocklist (SBL)? How do I get an IP removed from the Spamhaus Blocklist (SBL)? Can I remove my IP from the Spamhaus Blocklist (SBL) if I am the end-user? Is there any fee for Spamhaus Blocklist (SBL) removal? When will my IP be removed from the Spamhaus Blocklist (SBL)? I am a system administrator. How can remove my IP(s) from the SBL?