DNSbl Details

What this DNSbl says about itself

This DNSbl is very aggressive and very few mail server administrators use it to block mail. If you are listed here -- don't worry about it. If you are a mail server administrator, use it with extreme care.

blackholes.five-ten-sg.com is a DNSBL that blocks a baker’s dozen of different kinds of spam that includes bulk mail and multistage relays. People using the service, like all DNSBL’s, will not receive email from any of the IP addresses that are on their list. Addresses are published to the list if they have sent spam messages to the maintainers. In addition, users can also build there own custom list. blackholes.five-ten-sg.com is a DNSBL that blocks a baker’s dozen of different kinds of spam that includes bulk mail and multistage relays. People using the service, like all DNSBL’s, will not receive email from any of the IP addresses that are on their list. Addresses are published to the list if they have sent spam messages to the maintainers. In addition, users can also build there own custom list and can only be used by people using five-ten-sg.com’s email server, which is available from their website for $50 per year.

Mail server administrators should never implement blacklists unless they are 100% sure of what they are doing. Misconfiguration can result in all incoming mail being blocked.

Additional Details: