Problem same DNS between Internet and local network
 

I have a domain: "abc.com", and it is hosted from any providers. My users connect Internet through ADSL connection. They check mail POP3 with parameters:
- POP: pop.abc.com
- SMTP: smtp.abc.com
Now, i have purchase a new Linux RH server, i configured a DNS "abc.com" on it. However, user can't check mail POP from host "abc.com". When i telnet "#telnet abc.com 110", i have received the message "Unknow service..."
So, how can i configure my DNS on Linux server as my domain hosting "abc.com" outside Internet?
It means, my local DNS: "abc.com" ; and my domain hosting "abc.com" from Internet, user in localnetwork can check mail POP3 without error through Linux server (gateway).

<<Internet-----exist(abc.com)>>-------------<gateway linux (abc.com for localnework use)>---Localnetwork---

Please help me. Thanks so much

b:z

You need to set up pop3.abc.com and smtp.abc.com in the DNS server configuration and point them to the mailserver (which is not the gateway, right?).

Thanks for your ideas,
However how can i set up as your suggestion?

Note: The gateway linux also run as Webserver, but it is accessed from local network, not external.

Well..what method do you use to configure the DNS server? Configuration files or any administration tool (web-based, for example)? If you're using configuration files, fin the right zone file (probably abc.com.zone in /var/named or /etc/named) and add to ADDITIONAL SECTION something like
pop.abc.com. A mailserveriphere
smtp.abc.com. A mailserveriphere

It doesn't work right.
Here is my short configuration:

- file: named.conf
==================================================
zone "0.in-addr.arpa" IN {
type master;
file "named.zero";
allow-update { none; };
};

zone "abc.com" IN {
type master;
file "db.abc";
allow-update { none; };
};

zone "1.168.192.in-addr.arpa" IN {
type master;
file "db.192.168.1.1";
allow-update { none; };
};

include "/etc/rndc.key";
======================================================

- file: db.abc
======================================================
$TTL 86400
@ IN SOA ns.abc.com hostmaster.abc.com. (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
;
IN A 192.168.1.1
NS www ; Inet Address of nameserver
abc.com MX 10 mail ; Primary Mail Exchanger
;
localhost A 127.0.0.1
bird A 192.168.16.10
mail CNAME bird
ns CNAME bird
www CNAME bird
pop.abc.com A 203.194.220.xxx
smtp.abc.com A 203.194.220.xxx
=======================================================

- file: db.192.168.1.1
=======================================================
$TTL 86400
@ IN SOA www.abc.com. hostmaster.abc.com. (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum
;
NS www ; Name server address
;
1 IN PTR abc.com.
;
=========================================================

Please help me solve the problem.
Thanks so much

Make it look this way:
I'm never sure about the dots, but I think that adding one after the names (the way you have written them) should make it work too.

Thanks for anyway. I'm to be succeed.
Thanks so much again