Limited to 1,000 requests/second

1. Go to the DNSBL configuration area for your mail server or antispam module
2. Set the query domain to "bl.0spam.org" or in some cases "bl.0spam.org." depending on your mail server required configurations.
3. Set the query type to "DNS" or "A"
4. That's it, you're done.

How to use the "Zero Spam Project" URL-DBL for free(limit of 1,000 requests per second):

1. Go to the URL-DBL configuration area for your mail server or antispam module
2. Set the query domain to "url.0spam.org" or in some cases "url.0spam.org." depending on your mail server required configuration perameters.
3. Set the query type to "URL"
4. That's it, you're done.

How to use the "Zero Spam Project" DNS-Whitelist for free(limit of 1,000 requests per second):

1. Go to the DNS White list configuration area for your mail server or antispam module
2. Set the query domain to "wl.0spam.org" or in some cases "wl.0spam.org." depending on your mail server required configuration perameters.
3. Set the query type to "WhiteList", "DNS WhiteList"
4. That's it, you're done.

The wl.0spam.org lists IP's for trusted senders. Be sure to only place this in your mail server white list configuration or you will have lots of issues.

High traffic Usage

If you think your servers periodically go over 1,000 requests per second you can still use our service, but be aware our servers will ignore the requesting IP for a period each time requests exceed 1,000 per second and your servers will not be protected using the "Zero Spam Project" service during that time.

If you operate high traffic mail server(s) and consistently exceed 1,000 request per second limit or want access to our professional dnsbl services please contact us by selecting "Service Request" in the form to the right to request unrestricted access to our dnsbl servers for the best anti-spam results.

Premium access in access of greater than 1,000 query requests/second is available for for a monthly fee of $200 per 1,000/second.