What do the different return codes mean in the Policy Block List (PBL)?
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What do the different return codes mean in the Policy Block List (PBL)?
If an IP address is listed in PBL, a DNS query will return either 127.0.0.10 or 127.0.0.11 depending upon whether the range was entered by Spamhaus or the ISP:
NS lookup of an inverse address which is not listed in PBL will return NXDOMAIN, like any other Spamhaus zone:
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