DNSBL 등록 방법

Posted 2008. 9. 22. 23:41

출처 :  http://www.spamhaus.org


How to use the SBL

The Spamhaus Block List ("SBL") can be used by almost all modern mail servers, by setting your mail server's anti-spam DNSBL feature (sometimes called "Blacklist DNS Servers" or "RBL servers") to query sbl.spamhaus.org.

Use of the SBL is free for individuals operating small mail servers as long as your email traffic is low. Commercial users, corporate networks and ISPs need to purchase a yearly subscription to use the service: see DataFeed.

For information on how to configure your mail server to use sbl.spamhaus.org please refer to your mail server documentation/manuals or ask your mail server developer. With so many different mail servers in use we can not offer technical help with setting up the SBL.

DNSBL Queries

DNSBL Zone to Query Returns Contains
sbl.spamhaus.org Direct UBE sources, verified spam services and ROKSO spammers
xbl.spamhaus.org Illegal 3rd party exploits, including proxies, worms and trojan exploits
sbl-xbl.spamhaus.org Combined zone to reduce queries
Includes both SBL and XBL zones

We recommend you use sbl.spamhaus.org together with xbl.spamhaus.org, as the SBL and XBL block different spam sources. To save you having to query two separate DNSBL zones there is a special combined "SBL+XBL" zone, sbl-xbl.spamhaus.org, which contains the complete SBL and XBL data (we recommend you use this combined zone), to use it, simply set your mail server's DNSBL check to query sbl-xbl.spamhaus.org only.

Not just for connection queries...

In addition to checking the IPs of the connecting servers against the SBL, you can significantly boost your spam catch rate by also scanning the email body of any mails that get past SBL/XBL looking for host names of URLs (web sites) advertised in spams, and checking the IPs of those hosts, and their names servers, against the SBL. This is because the SBL lists the IPs of spammers' websites in addition to their mail servers. This feature ("URIBL_SBL") is available in SpamAssassin 3.0, and code to do this is also available as a sendmail milter from here.

Data Feed: Zone Transfers (rsync) for Corporate networks & ISPs

For corporate users and
Internet Service Providers Spamhaus provides a dedicated Data Feed service which transfers the Spamhaus DNSBL zones to a local DNS server on your network and keeps the zones synchronised every 30 minutes. To submit an application for this service see: Data Feed Application Form.

Testing your SBL Setup

Once you have set up your mail server to use sbl.spamhaus.org, you can test to see if the SBL blocking is working by sending an email (any email) to: nelson-sbl-test@crynwr.com (you must send the email from the mail server which you wish to test). The Crynwr system robot will answer you to tell you if your server is correctly blocking SBL-listed IPs or not.

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