Re^2: Ideas solicited: Using Perl to sort through Toxic CIDR blocks

I suppose I should have guessed that ARIN would be useless. Heck, they're not even the only people passing out IPs. I suppose the real answer here is either "you blindly trust your spam service and follow their blacklist" or you don't.

I don't really think things are quite that dire but it seems that all you can do is the "brute force" approach.

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Re^3: Ideas solicited: Using Perl to sort through Toxic CIDR blocks by atcroft (Abbot) on Jun 02, 2014 at 17:10 UTC
I did have two additional thoughts: ARIN apparently has an API for accessing WHOIS data, which may be useful, and Could you (and, would you want to) perhaps look up SPF records for domains your mail server contacts frequently and if present specifically "white-list" some of those in this system? Just thoughts, in case they might prove useful.	[reply]