cannot send mail from one domain to another
 

I have two internal sendmail servers which are running successfully. Both the servers have their own dns. One is x.com (192.168.2.5) and another is y.com (192.168.2.21). I can not send mail from x.com to y.com.

Please help me to configure the servers.

Do you have MX records in you zone files?

Try changing you thread title to something vaguely dexcriptive of your problem rather than "Pls help me"

Would you please instruct me how to do the mx record?

$TTL 86400
@ IN SOA dns.bipl.com. root@bipl.com. (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum

@ IN NS dns.bipl.com.
IN MX 10 mail.bipl.com.

IN A 127.0.0.1
dns IN A 192.168.2.5
mail IN A 192.168.2.5
www IN CNAME bipl.com.



$TTL 86400
@ IN SOA dns.hbcl.com. root@hbcl.com. (
49 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ) ; minimum

@ IN NS dns.hbcl.com.
IN MX 20 mail.hbcl.com.



IN A 127.0.0.1
dns IN A 192.168.2.21
mail IN A 192.168.2.21

check if things are working first with

dig bipl.com MX

You have to be more specific. Between this might help

http://www.zytrax.com/books/dns/ch8/mx.html

[root@mail ~]# dig bipl.com mx

; <<>> DiG 9.2.4 <<>> bipl.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10568
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; QUESTION SECTION:
;bipl.com. IN MX

;; ANSWER SECTION:
bipl.com. 258012 IN MX 10 smtp.getontheweb.com.

;; AUTHORITY SECTION:
bipl.com. 67561 IN NS ns2.dnsnameservice.com.
bipl.com. 67561 IN NS ns1.dnsnameservice.com.

;; ADDITIONAL SECTION:
smtp.getontheweb.com. 258792 IN A 66.36.236.47
ns1.dnsnameservice.com. 238763 IN A 209.61.212.151
ns2.dnsnameservice.com. 6414 IN A 209.61.212.88

;; Query time: 488 msec
;; SERVER: 69.88.13.5#53(69.88.13.5)
;; WHEN: Thu Mar 20 15:31:00 2008
;; MSG SIZE rcvd: 158



[root@hbclmail ~]# dig hbcl.com mx

; <<>> DiG 9.2.4 <<>> hbcl.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65470
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 2

;; QUESTION SECTION:
;hbcl.com. IN MX

;; ANSWER SECTION:
hbcl.com. 86400 IN MX 20 mail.hbcl.com.
hbcl.com. 86400 IN MX 10 mail.bipl.com.

;; AUTHORITY SECTION:
hbcl.com. 86400 IN NS dns.hbcl.com.

;; ADDITIONAL SECTION:
mail.hbcl.com. 86400 IN A 192.168.2.21
dns.hbcl.com. 86400 IN A 192.168.2.21

;; Query time: 6 msec
;; SERVER: 192.168.2.21#53(192.168.2.21)
;; WHEN: Thu Mar 20 15:19:06 2008
;; MSG SIZE rcvd: 123

[root@mail ~]# dig bipl.com mx

; <<>> DiG 9.2.4 <<>> bipl.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19130
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 2

;; QUESTION SECTION:
;bipl.com. IN MX

;; ANSWER SECTION:
bipl.com. 86400 IN MX 10 mail.bipl.com.
bipl.com. 86400 IN MX 20 mail.hbcl.com.

;; AUTHORITY SECTION:
bipl.com. 86400 IN NS dns.bipl.com.

;; ADDITIONAL SECTION:
mail.bipl.com. 86400 IN A 192.168.2.5
dns.bipl.com. 86400 IN A 192.168.2.5

;; Query time: 4 msec
;; SERVER: 192.168.2.5#53(192.168.2.5)
;; WHEN: Thu Mar 20 15:41:28 2008
;; MSG SIZE rcvd: 123