This service takes feeds from the following reputable lists:
Three Spamhaus lists (SBL, XBL and PBL) plus these lists joined together as a Zen list
The Spamhaus Whitelist
The multi.surbl.org SURBL list
The multi.uribl.com URIBL list
The dnswl.org Whitelist
DNS list profiles
We recommend that you use the Spamhaus sender lists in the first phase. In the second stage filter, the SURBL and URIBL lists can help to locate many of the otherwise difficult, remaining unwanted messages.
DNS blacklists are a well-established technique that identify sources of email abuse as lists of IP address blocks, enabling Janet-connected organisations to quickly and easily reject a high proportion of unwanted email.
Unlike most blacklists, SURBLs and URIBLs are not lists of message senders but URLs (web addresses, some but not all representing undesirable sites) which have been seen in email messages and have been identified as spam or phishing, or are otherwise malicious.
Links seen in these messages are more stable than the rapidly changing botnet IP addresses used to send the vast majority of them.
Whitelists contain all currently known trusted email servers, and are the opposite of blacklists. Email from whitelisted email addresses, domains and/or IP address should generally be allowed through the mail server.
Email whitelists are used to reduce the incidence of false positives and to speed up the filtering process, as they are often based on the assumption that most legitimate mail will be from a relatively small and fixed set of senders.
Service level description
This is an email abuse protection service to assist electronic mail systems at organisations to determine if they should refuse connections from certain addresses. The system is based on data from reputable sources and provides DNS-style resolution.
This service is centrally-funded.
You are responsible for ensuring that the email system at the organisation is configured to use the service.
You are also responsible on an ongoing basis for maintaining contact details.
Please ensure your organisation understands and adheres to the security policy.
Hours of service
The service is available 24 hours a day, seven days a week, all year.
The target availability is 99.5% during the hours of service defined above, measured monthly over a 12 month period, excluding service-affecting maintenance.
Service-affecting maintenance is capped at 0.5% and is normally carried out with at least two weeks' notice.
Faults with the service may be reported via the service desk on tel: 0300 300 2212 or via email: email@example.com.