Sergio Minini {NETKEY} wrote:
> Hey list,
> I am wondering this basic question:
> I have a customer for whom I provide DNS but their mailserver is hosted
> by another ISP.
> Is there anything I could do with my DNS zone file to provide them a
> rDNS

Not to my knowledge.

> or its just up to the ISP, since they "own" their mailserver's IP?

The "owner" of the IP address is authoritative for rDNS, and maintains these
records. I believe it's possible for them to delegate the authority
elsewhere (meaning you could maintain the record), but I don't know how that
works. In any case the owner of the address needs to be involved.

> Thanks!
> \Sergio
>  
> /
> ------------------------------------------------------------------------
> /
> /Excerpt from zone file:/
> // 
> /MX  10  mail.domain.com.ar.         ; Primary Mail Exchanger
> MX  20  home.domain.com.ar.
> MX  90  mail2.domain.com.ar./
> // 
> /;
> mail            IN A    200.11.29.52
> domain.com.ar.     IN A    20.80.15.3
> home            IN A    200.11.29.53
> mail2           IN A    20.80.15.3
> www             IN A    20.80.15.3
> ftp             IN A    20.80.15.3
> /
> 
> /; domain SPF
> ;domain.com.ar. IN TXT "v=spf1 ip4:200.11.29.52 -all"
> ------------------------------------------------------------------------
> /
>  
> 
> 
> ------------------------------------------------------------------------
> 
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-- 
-Eric 'shubes'
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