https://bugs.exim.org/show_bug.cgi?id=2631
--- Comment #1 from Jeremy Harris <jgh146exb@???> ---
It's possible to use "!&127.255.255.0" which does take out 255.0/8.
Is there sufficient agreement among dnsbl operators to choose something as a
new default for filtering?
Spamhaus list as return ranges 127.0.0.0/24, 127.0.1.0/24, 127.0.2.0/24 for
hits.
Sorbs list return codes in the range 127.0.0.0/28
Then there's the logging side of the issue. Maybe a new log_selector?
But Spamhaus also returns values in 127.255.255.0/24 to indicate non-match
internal error cases. Should we care for logging, or leave the checking of
the returned value/s to the sysadmin?
--
RFC 6471 says:
- "most" ip-based dbsbls support queries for addrs in 127.0.0.0/24 (often
127.0.0.2)
to test operational status
- responses outside 127.0.0.0/24 should be taken as indication of non-function
- name-based dnsbls RECOMMENDED to support queries for "test" for operational
status; and a query for "INVALID" getting a positive response should be taken
as
indication of non-function
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