postfix port not visible to other machines

Friends.

I configured postfix mail server in my server.
It seems simple.
I entered all the details in mail.cf
then strarted.
nmap localhost shows port 25

but from other system nmap mailserver wont shows port 25.

i gave telnet mailserver 25
it gives connection failed.

what to do?

Thanks.

T.Shrinivasan.

On 27 Mar 2006 20:37:49 -0800, shrini wrote:
> Friends.
>
> I configured postfix mail server in my server.
> It seems simple.

Yep, was for me. Reading the docs helped.

> I entered all the details in mail.cf

Oh, hmmm, I just append what I wanted changed to /etc/postfix/main.cf

you can use
http://groups.google.com/advanced_group_search
to see my main.cf for LAN and WAN examples.

> then strarted.
> nmap localhost shows port 25
>
> but from other system nmap mailserver wont shows port 25.
>
> i gave telnet mailserver 25
> it gives connection failed.
>
> what to do?

check /var/log/mail and /var/log/messages

If tcwrappers is running I would set up /etc/hosts.allow/deny.
Examples for my LAN's domain ".home.invalid" on all nodes.

$ cat /etc/hosts.allow
#
# hosts.allow This file describes the names of the hosts which are
# allowed to use the local INET services, as decided
# by the '/usr/sbin/tcpd' server.
#

ALL: LOCAL,.home.invalid

# End of hosts.allow.Run service xinetd reload


$ cat /etc/hosts.deny
#
# hosts.deny This file describes the names of the hosts which are
# *not* allowed to use the local INET services, as decided
# by the '/usr/sbin/tcpd' server.
#

ALL: ALL:\
spawn ( \
/bin/echo -e "\n\
TCP Wrappers\: Connection Refused\n\
By\: $(uname -n)\n\
Process\: %d (pid %p)\n\
\n\
User\: %u\n\
Host\: %c\n\
Date\: $(date)\n\
" | /bin/mail -s \"$(uname -n)\" root ) & : DENY

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shrini wrote:

> nmap localhost shows port 25

In main.cf review "inet_interfaces".

"nmap -p 25 127.0.0.1" (localhost) works fine, but "nmap -p 25
the.local.ip.address" (Example : nmap -p 25 192.168.1.1 25)?

You have firewall blocking port 25 in your linux machine?

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"shrini" <(E-Mail Removed)> writes:

>Friends.

>I configured postfix mail server in my server.
>It seems simple.
>I entered all the details in mail.cf

What is mail.cf?

And the daemons are controlled from master.cf What are the contents of that
file?
And when you start up postfix are there error messages in /var/log/syslog
or messages?

>then strarted.
>nmap localhost shows port 25

>but from other system nmap mailserver wont shows port 25.

>i gave telnet mailserver 25
>it gives connection failed.

>what to do?

>Thanks.

>T.Shrinivasan.

Friends.

Thanks for your suggestions.

There is no firewall running in my systems.

In server, i can mail for internal users.
But the from address is like this
(E-Mail Removed)ldomain

I have already setup Bind DNS.
so, i doubt the error may be in dns configuration.

The forward lookup only occurs.
Reverse lookup shows errors.

And, the command dnsdomainname gives nothing in server and in client.

so, let me reconfigure my dns and tell you the status.

Thanks for your kind responses.

T.Shrinivasan.