[eGroupWare-users] cannot do reverse lookup for my domain: who's responsible?

[<zha...@re...>]

Hello. I brought a domain name from a local domain register. that is
hackerdom.org. Now the problem is I cannot do reverse lookup for my =
domain.
This cause the emails sent from this domain's mail server refused by some
mail servers.=20

take the www host for example:
/home/zhangweiwu> host www.hackerdom.org
www.hackerdom.org has address 218.85.134.174
/home/zhangweiwu> host 218.85.134.174
Host 174.134.85.218.in-addr.arpa not found: 3(NXDOMAIN)

The problem is the local domain register company is really stupid, I =
cannot
reach the tech people in the company for the problem, the front-table =
people
stop me and keep telling me they don't have the service because they never
heard of this service!=20

And I'm pretty dumb / having little knowledge on dns to fight this problem
on my own:(

The local domain register company provide a web-based interface of domain
management, the web management tool can do:

1. Let me specify two dns server address. Perhaps one main server and a
backup server. These fields are filled up with this company's own dns =
server
by default.

2. If I use their dns server, there are webpages for me to add subdomains,
assign A, CNAME and MX records.

My question (assume all are done on Linux)
1) Do I *have to* change my domain register to get reverse look up =
working?
2) What if I set up my own dns server? Is it very difficult? If I run my =
own
dns server for my domain could reverse lookup work?
3) If the task 2) is too difficult for newbie like me, is it possible I =
find
someone who runs dns server for his/her domain have his/her dns server
configured to handle my domain too, and can provide reverse look up?

Just too dumb to figure out everything about dns myself. Thank you for =
your
help!
--
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