SFDB Filter - SpamFilter Distributed Blacklist |
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The SFDB filter uses a very powerful resource to stop spam: Anytime an IP address is added to SpamFilter's local IP blacklist cache, the SFDB filter updates our Distributed Blacklist centralized database. This allows the SFDB filter to have access to a huge repository of spammer's IPs, updated in real-time by all the SpamFilter ISP users in the world. IP addresses from the database are automatically aged and removed from the database within 24 hours if they receive no further reports. The SFDB filter detects spam by checking IP addresses against the SFDB database. The "network reliability" level tells SpamFilter how many different users must have reported a specific IP in order to classify it as spam. Use a Network Reliability value of 0 to disable the SFDB filter. In SpamFilter Enterprise, each setting can be configured independently for each email domain . In the free version of SpamFilter, the SFDB filter will only query the SFDB database, reporting of new IPs is disabled. Furthermore, in the free version, the SFDB filter is limited to a 15-day trial period.
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