> Matus UHLAR - fantomas wrote: > > 181.188.252.222.in-addr.arpa domain name pointer localhost. > > > > That is why FcRDNS is being used everywhere... > > > > localhost has address 127.0.0.1 => fail.
On 03.06.09 19:31, Adam Katz wrote: > Actually, localhost doesn't resolve via DNS; it has no A record, nor > any other record type. It resolves locally without using DNS; see > your /etc/hosts file. Similarly, 1.0.0.127.in-addr.arpa. has no PTR > record indicating it should be called localhost. actually, many recursive DNS servers have configured zone for "localhost" by default and for "0.0.127.in-addr.arpa" or "127.in-addr.arpa". However if anything doesn't resolve, MTA should not accept/use it. > > if anyone uses reverse DNS name without forward-confirming it, it's their > > own fault and they can take all consequencies from such stupid setup. afaik > > some reverse-checking services are more strict about invalid than about > > nonexisting hostnames. And I recommend to behave like that. > > > > SA (usually) uses hostname passed by MTA, so if an MTA is affected by this > > bug, blame MTA, not SA. And I'm not sure if the hostname is used by any > > checks that would cause positive (oor lower negative) score. > > Sadly, too many servers are set up improperly in this context, so I > doubt I'm in the minority when I say that I don't use this metric to > single-handedly block mail. I was only talking that SA does not resolve IPs but hostnames are taken from Received: headers (there was an exception for MTA that does not resolve DNS) so the MTA not the SA should be blamed if the "hostnames" are not correct (forward confirmed). > > Maybe SPF, I expect someone to comment on this... > > Same problem as above: "localhost" is not actually a domain. > $ host -t TXT localhost. I was not talking about localhost, but about SPF resolution. The TXT must be of course taken from DNS, but if the record contains "A:" etc, it can be compared to resolved hostname in Received: header. And by the sentence above I meant that someone who understands the SPF should comment this issue. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. I wonder how much deeper the ocean would be without sponges.
