[SOLVED] External mail and smtp timed out error - Ubuntu 8.04

[sahabcse]

Hi

I have installed the zcs-5.0.14 in ubuntu 8.04 server. Now I can able to send and receive mail locally. And I can able to send mail to external mail like gmail.com. But when ever I try to send mail from gmail.com to my domain I can't able to get a mail.

Here I am pasting the /etc/hosts/, nsswitch.conf and dig result. Also I can able to connect the server using SMTP port from out side. Nmap result showing port is in filter state. Kindly help me regarding this issue. No firewall is installed in my system.

====================================
root@rctjct:~# host `hostname`
rctjct.in has address 122.166.40.27
rctjct.in mail is handled by 10 smtp.rctjct.in.

root@rctjct:~# cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
122.166.40.27 smtp.rctjct.in rctjct.in

root@rctjct:~# cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd: compat
group: compat
shadow: compat

hosts: files dns mdns
networks: files

protocols: db files
services: db files
ethers: db files
rpc: db files

netgroup: nis

root@rctjct:~# dig rctjct.in mx

; <<>> DiG 9.4.2 <<>> rctjct.in mx
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25702
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;rctjct.in. IN MX

;; ANSWER SECTION:
rctjct.in. 79391 IN MX 10 smtp.rctjct.in.

;; AUTHORITY SECTION:
rctjct.in. 76106 IN NS ns2.keltron.org.
rctjct.in. 76106 IN NS ns1.keltron.org.

;; ADDITIONAL SECTION:
ns2.keltron.org. 14972 IN A 59.145.111.67
ns1.keltron.org. 14972 IN A 59.145.111.66

;; Query time: 59 msec
;; SERVER: 125.22.47.125#53(125.22.47.125)
;; WHEN: Fri Mar 27 12:12:49 2009
;; MSG SIZE rcvd: 127

nmap -PN rctjct.in

Starting Nmap 4.62 ( Nmap - Free Security Scanner For Network Exploration & Security Audits. ) at 2009-03-27 11:25 IST
Interesting ports on ABTS-KK-Static-027.40.166.122.airtelbroadband.in (122.166.40.27):
Not shown: 1686 closed ports
PORT STATE SERVICE
22/tcp filtered ssh
25/tcp filtered smtp
67/tcp filtered dhcps
68/tcp filtered dhcpc
80/tcp filtered http
98/tcp filtered linuxconf
102/tcp filtered iso-tsap
110/tcp open pop3
135/tcp filtered msrpc
143/tcp open imap
303/tcp filtered unknown
389/tcp open ldap
444/tcp filtered snpp
465/tcp open smtps
636/tcp filtered ldapssl
728/tcp filtered unknown
739/tcp filtered unknown
890/tcp filtered unknown
912/tcp filtered unknown
972/tcp filtered unknown
993/tcp open imaps
995/tcp open pop3s
1080/tcp filtered socks
1241/tcp filtered nessus
1723/tcp filtered pptp
3128/tcp filtered squid-http
5000/tcp filtered upnp
6588/tcp filtered analogx
6667/tcp filtered irc

================================================== =


Awaiting for your response.

Regards,
Sahab

[uxbod]

Welcome to the forums

I have just tried connecting to your IP on port 25 and it is not responding. If you connect locally does it return the SMTP banner okay ? If so, then it would appear that a firewall is blocking connections.

[sahabcse]

Hi

Thanks for your reply, I can able to connect smtp using locally but outside not connecting.

root@rctjct:~# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 smtp.rctjct.in ESMTP Postfix


Can you tell how can we open the port state filtered state to open. Here my smtp port in filtered state.

25/tcp filtered smtp

[phoenix]

Your /etc/hosts file is incorrect, have a read of the documentation and correct it. Try connecting to your server on it's FQDN not an IP or localhost.

[uxbod]

Have you disabled IPTables ?

[sahabcse]

Hi All

Thanks for all response. Our ISP block the smtp prort, Now they release the port and the issue has been resolved.