How to use the Spamhaus CSS RBL

EQ Admin

EQ Forum Admin
Staff member
According to the Spamhaus CSS page :

CSS is an integral part of the SBL (and therefore part of ZEN). CSS data is distinguished only by a different SBL return code ( as opposed to normal SBL records which use If you are already using the SBL or ZEN you should not need to do anything except ensure that your spam filter handles the additional return code.

CSS Delisting Procedure

Unlike traditional SBL records, SBL CSS records do not have a manual delisting procedure. CSS records are automatically expired after 3 days. For this automatic expiration to work, it is vital that all spamming is terminated. If spamming continues, or continues from IPs in the vicinity of a listed IP, the CSS expiration date is continually reset forward upon being redetected. Redetections are also flagged to the SBL team for more extensive SBL listings of the IP range(s) involved.

In normal operation, therefore, CSS records expire automatically once the customer leasing the IPs is removed from the network and CSS detectors stop detecting spam activity from those IPs. Contact the CSS Removals team ONLY if you are the ISP responsible for the complete IP allocation(s) to a customer and if an IP is still listed on the CSS more than 3 days after the customer has been completely removed from your network.

To contact CSS Removals click this mailto link and do not alter the Subject line (emails without 'SBLCSS' in the Subject are discarded).

Spamhaus appreciates any information supplied to us by ISPs that can help identify a snowshoe spam customer for our records.