On 15 Feb 2021, at 16:02, Simon Arlott via mailop wrote:

Note: it is not really good enough to just filter the responses and
ignore the problem. Invalid responses need to be logged for further
action, either to fix the resolver or remove the lookup.

A good point, although I would argue that the existing implementations of checking only for specific results are sufficient IF one also monitors DNSBL effectiveness and/or for normal operation using the standard test entries (https://tools.ietf.org/html/rfc5782#section-5.)

--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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