DNSBL & FraudBL rule updates

As of 22 October, we have changed the behaviour of message analyzing.

If a message contains known hosts, discard the message as already listed but reset ”deleted”-dates and relist if necessary.

Messages are no longer discarded with a ”already listed”. This behaviour was built to save data storage. Data storage is a problem, but we have to live with that even if some cases is automatically solved by our orphan-cleaner (DNSBL-46). So, for each message found as ”already listed”, we are incrementing the hostcount. This means that, the more hits from a server the harder rules are applied on the host.

Source: DNSBL-54

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