Chris Lewis wrote:
Matthew Sullivan wrote:
SORBS has listed 127.0.0.1 in the past, though never used it as a return
code. It occurred due to error, but it was an easy one - the relay
tester was triggered to test localhost by someone first setting up an
open relay then sending spam, then within hours changing the DNS record
to return 127.0.0.1 for the host. Result, a request for a valid
hostname was put in the system then before it was tested someone changed
the target IP to localhost. This was fixed fairly promptly but it was
not an indicator of a shutdown. I believe other DNSBls have listed
127.0.0.1 on occasion.
I put this into the section on reserved addresses (becomes second
paragraph):
<t>As additional insurance against listings of space that should
not be through testing or other unforeseen events, DNSBL
operators SHOULD
consider implementing facilities to prevent them. At least one
popular automated DNSBL has implemented permanent exclusions for
such addresses.</t>
I consider this a reliability/integrity improvement.
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