Milter-greylist

On 22 January 2015 08:47:54 CET, "'Bruncsak, Attila' attila.bruncsak@... [milter-greylist]" <milter-greylist@yahoogroups.com> wrote:
>> Cheking for sender domain registration age would be an interesting
>> feature in milter-greylist, unfortunately the information is
>scattered
>> in vraious Whois registries with different formats, so it seems a job
>> for a scripting language. If someone has ideas on how to implement
>that
>> reliabily, I am interested.
>> 
>
>I think this should be done via simple DNS query.
>An example: if you are interested in the registration date of
>example.com
>you do a TXT query of example.com.domainage.org an that returns
>its registration date in a standard format.
>
>The script you mentioned should just populate the domain domainage.org.
>
>I do not know is there any such service already existing?
>
>If not, may be I am the first having this idea?
>
>Best,
>Attila

Actually, this is called WHOIS, and there are some 30 years worth of standards, protocols, clients and multiple dispersed public servers in a fashion similar and related to DNS registration/referral system. Scripts to parse the web-forms are not the only way to do it, nor the preferred way ;)

You can start with an overview on Wikipedia, it is pretty informative. Indeed, such an optional feature seems useful for spam filtering.

HTH,
Jim
--
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