DroneBL's Expiration Policy
By default, active entries do NOT auto-expire at DroneBL. Inactive ones normally are kept for a maximum of 2 years for historical reference.
Sure, this might cause issues with dynamically assigned ranges and such, agreed, but we think that by auto-expiring entries, ISP's will never be aware of the issues that are going on within their network.
Administrators should take decent care of their network and should be aware of the problems in their networks in order to deal with them. Especially these days when abuse mailboxes are mostly filled up with the sender not getting any responses, we notice that keeping entries DOES have a pro-active effect. (IP's listed cannot be simply reassigned to for example business clients, as there is a high probability they will also flush their mail through that pipeline)
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