What Is a Spam Blacklist?

The Spam Blacklist (SBL) is a database of IP addresses provided by the International Anti-Spam Organization (Spamhaus) and recommends blocking email from these addresses. The mail system can query this blacklist in real time through the Internet, allowing the mail server administrator to identify, mark, or block connections from these addresses-the International Anti-Spam Organization considers these addresses to be associated with a large number of messages without the permission of the recipient (also known as Spam-SPAM) is related to the origin or source. The blacklist database is maintained by a special research team and demonstrating experts from more than ten countries. Newly confirmed spam blacklists are added 24 hours a day, and addresses that have been resolved are removed.

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(Spam blacklist)

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The Spam Blacklist (SBL) is a database of IP addresses provided by the International Anti-Spam Organization (Spamhaus) and recommends blocking email from these addresses. The mail system can query this blacklist in real time through the Internet, allowing the mail server administrator to identify, mark, or block connections from these addresses-the International Anti-Spam Organization considers these addresses to be associated with a large number of messages without the permission of the recipient (also known as Spam-SPAM) is related to the origin or source. The blacklist database is maintained by a special research team and demonstrating experts from more than ten countries. Newly confirmed spam blacklists are added 24 hours a day, and addresses that have been resolved are removed.

The Spam Blacklist (SBL) is a database of IP addresses provided by the International Anti-Spam Organization (Spamhaus) and recommends blocking email from these addresses. The mail system can query this blacklist in real time through the Internet, allowing the mail server administrator to identify, mark, or block connections from these addresses-the International Anti-Spam Organization considers these addresses to be associated with a large number of messages without the permission of the recipient (also known as Spam-SPAM) is related to the origin or source. The blacklist database is maintained by a special research team and demonstrating experts from more than ten countries. Newly confirmed spam blacklists are added 24 hours a day, and addresses that have been resolved are removed. There are also several authoritative anti-spam websites in China that provide spam blacklists, such as the China Anti-Spam Coalition.

SBL spam blacklist strategy

To blacklist and remove, see SBL policies and SBL removal procedures at various anti-spam websites

Using SBL

How to use SBL to protect your mail server and network, see SBL FAQs for various anti-spam websites. SBL can block lists based on IP addresses or URIs (blocking based on URI is very effective). SBL also includes a combined blacklist blocking provided by the International Anti-Spam Organization.

Before your mail server uses these blacklists to filter spam, please read the DNSBL Terms of Use to determine if you are eligible for free.

Blacklists are generally free. Websites that provide blacklists are not responsible for the losses caused by the blacklisting by mistake. Normal mail servers can set up a whitelist to ensure normal mail sending and receiving.