[SOLVED] centos+zimbra: either i can receive mail or send mail?

[vinaysatwe]

we have setup a small mail server on centos with zimbra. everything went on smoothly. With dns lookups Enabled i am able to send mails and cant receive mails in inbox ( they are differed and but i can see the incoming mails in mail queues) .

if dns lookups is disabled i can receive mails but not able to send the emails.

i am behind a adsl router with broadband connection and port forwarding (NAT) has been done. i have a static ip & all the MX records have been updated . so can one pls help me out . the log shows mail transfer agent unavailable mail gets deffered and i see the origin ip as 127.0.0.1 and origin host as localhost.localdomain.
is it that the mails are not being forwarded from localhost to respective mailboxes.
thanks in advance....

[phoenix]

Did you set-up a Split DNS? If you're behind a NAT router you'll need that, when you've done that search the forums for details of what you need to do to check your DNS A & MX records and /etc/hosts file are all OK.

[uxbod]

Welcome to the forums

Please post the following information

cat /etc/hosts
cat /etc/resolv.conf
dig yourdomain mx
dig yourdomain any
host `hostname` <- note backticks and not single quotes

If you are behind a firewall on a private IP you will need to setup a Wiki :: Split DNS architecture.

[vinaysatwe]

here are the answers for the commands:
[root@mail ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.1.5 mail.mydomain.com mail


[root@mail ~]# cat /etc/resolv.conf
search mydomain.com
nameserver localhost
nameserver 202.54.10.2
nameserver 202.54.29.5


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

; <<>> DiG 9.3.4-P1 <<>> mydomain.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11650
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

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

;; ANSWER SECTION:
mydomain.com. 8628 IN MX 10 61.xx.76.xx.

;; Query time: 24 msec
;; SERVER: 202.54.10.2#53(202.54.10.2)
;; WHEN: Thu Jul 2 15:52:10 2009
;; MSG SIZE rcvd: 64


[root@mail ~]# dig mydomain.com any

; <<>> DiG 9.3.4-P1 <<>> mydomain.com any
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46209
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mydomain.com. IN ANY

;; ANSWER SECTION:
mydomain.com. 3665 IN NS ns1.net4india.com.
mydomain.com. 3665 IN NS ns2.net4india.com.
mydomain.com. 8318 IN MX 10 61.xx.76.xx.
mydomain.com. 3665 IN A 202.xx.129.xx

;; Query time: 31 msec
;; SERVER: 202.54.10.2#53(202.54.10.2)
;; WHEN: Thu Jul 2 15:57:20 2009
;; MSG SIZE rcvd: 126

[root@mail ~]# host mail.mydomain.com
mail.mydomain.com has address 61.xx.76.xx

thanks friends

[uxbod]

If you have installed BIND on your ZCS server then the only entries you should have in your /etc/resolv.conf are

search mydomain.com
nameserver 127.0.0.1

Once this change has been made please run the same commands again and post them please.

[vinaysatwe]

after the changes sugeested the output is as follows;

cat /etc/hosts

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.1.5 mail.mydomain.com mail



cat /etc/resolv.conf
search mydomain.com
nameserver 127.0.0.1



dig mydomain.com mx

; <<>> DiG 9.3.4-P1 <<>> mydomain.com mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 29016
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

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

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu Jul 2 16:39:18 2009
;; MSG SIZE rcvd: 36




dig mydomain.com any
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 41092
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mydomain.com. IN ANY

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu Jul 2 16:39:49 2009
;; MSG SIZE rcvd: 36


host mail.mydomain.com
Host mail.mydomain.com not found: 2(SERVFAIL)

[vinaysatwe]

i am not clear about the split-dns concept but i have just created the dns on the same server which shows me a mydomain.com zone.

thanks

[uxbod]

Well you need to define a MX and A record in your DNS for your ZCS server.

[vinaysatwe]

Hello,
we have already made the changes at the domain level so are you asking us to make the neccessary changes on the local machine using bind?
thanks gr8 help from you,

[vinaysatwe]

by setting the forwarders in named.conf i am able to now send and receive the mails seamlessly.
many thanks to all.

happy mailing