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|SBL Policy & Listing Criteria
The Spamhaus Block List ("SBL") Advisory is a database of IP addresses which do not meet Spamhaus's policy for acceptance of inbound email and therefore from which Spamhaus does not recommend the acceptance of electronic mail.
IP addresses are listed on the SBL because they appear to Spamhaus to be under the control of, or made available for the use of, senders of Unsolicited Bulk Email ("spammers"). The SBL database will normally include IPs identified to Spamhaus's best ability as likely direct spam sources, spammer hosting/DNS, spam gangs and spam support services.
Notifications of Listings
Spamhaus maintains a database of worldwide Internet Service Providers which includes the ISP's contact address for abuse issues (where known). On creating a new SBL record the SBL database automatically emails a notification of the listing to the ISP's abuse contact (where known).
IP addresses are removed immediately from the SBL database upon receipt by the SBL Team of notification from the IP owner (the Internet Service Provider responsible for assigning or routing the IP address) that the reason for listing has been corrected or terminated. See SBL Delisting Procedure for a detailed description of delisting policy and procedure.
Spamhaus does not perform scans to update SBL records. It is the ISP's responsibility to advise the Spamhaus Project of any changes which affect a listing. On being advised of changes, Spamhaus will endeavor to amend the listing as quickly as possible.
If not removed manually from the database, all SBL records eventually time out and are automatically removed. Each SBL record has a timeout value set by the record Editor as deemed appropriate for the listing. Unidentified spam sources normally have a short time-out of 2, 7 or 14 days, persistent spammers may have a timeout set at 6 months, while known spam gangs with ARIN-assigned IPs will normally have the timeout set at one year or more.