On 14/06/2016 20:40, Steve Freegard wrote:
> On 14/06/16 10:19, "陈俊平 via mailop.org" <chenjunp...@corp.netease.com> wrote:
>
>> Hello All,
>>
>> One of my IP address 123.58.177.172 got blacklisted on SpamRats' RBL, when
>> tried removing it from the blacklist I got a rejection as below:
>>
>> _>> Does IP Address comply with reverse hostname naming convention...
>> Failed!_
>> _>> RATS-Dyna - On the list. To be removed go here_
>> _>>_
>> _>> The IP address you have specified does not comply with best practices.
>> Currently, the reverse DNS for this IP address is: m172-177.vip.163.com. For
>> more information, please review the above "List Specifications" section, or
>> this best practice documentation [1]._
>>
>> This IP address is definitely a static one(rather than a dynamic IP) and it
>> has a proper PTR record(not violating the RFC 1035 [2]) as:
>>
>> _$ dig -x 123.58.177.172_
>> _172.177.58.123.in-addr.arpa. 86400 IN PTR m172-177.vip.163.com._
>>
>> So I am wondering why SpamRats says "not comply with best practices", while
>> I've contacted their admin on Help page, are there any guys got such kind of
>> warnings?
>>
>> I appreciate any info and discussion, thank you very much.
>
> Because the hostname contains the last two octets of the IP address, e.g. it
> "looks" dynamic and basically it is dynamic - it's an automatically generated
> name based on the IP address.
>
> Whilst others might disagree with this, there's plenty of places and software
> that with look at that PTR and say "it's dynamic" and treat it accordingly
> and they don't have to use a DNSBL to determine that because it's simple to
> do with heuristics.
>
> Kind regards,
> Steve.
Correct, I use on some mail servers milter-regex rules that hit on
things like this as well, if it looks like, and smells like, then it
probably is.
--
If you have the urge to reply to all rather than reply to list,
you
best first read http://members.ausics.net/qwerty/
Links:
------
[1] http://spamauditor.org/best-practices/check-ip-reverse-dns
[2] http://tools.ietf.org/html/rfc1035#page-12_______________________________________________
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