On 6 Mar, Nigel Metheringham did thusly spake:
>
> Reading from the spec document....
>> Even if its address doesn't match `host_lookup', a sending host's real
>> name is looked up from its IP address if the argument it provides for
>> the HELO or EHLO command is the local host's own name, or the name of
>> one of its local domains, which seems to be a fairly common
>> misconfiguration.
>
> Does this extra logic actually gain anything, and would we be better
> dropping this special casing on DNS reverse lookups and just relying on
> the `host_lookup' config variable.
>
Agreed. This behaviour is non-obvious. When one has a
`host_lookup' or such type option, and one has only one of them, one
expects that specifying an IP range with it ACTUALLY RESULTS in that IP
range being omitted from reverse-lookups :-)
I am sure it would be most frustrating to users to find exim STILL
refusing to deliver, especially inside a masqueraded LAN where there is
no security concern.
Hence perhaps an extra option - host_lookup_domains ???
-paul
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