Hi, I have some problem. I configuration postfix and dovecot but when send email from my local computer on server emails not be provided.
I get information in mail refused to talk to me: 451 4.0.0 111 Connection refused. I attached my settings domain in linode DNS manager.

webjacek,
Hiding all your information, such as domain and IP, means we can't help you. You need to give us as much information as possible to be able to help you. Fortunately you didn't hide them all.

diamentowaprzygoda.pl - 109.74.203.51

Your SMTP process is not listening on port 25 or 465, though both of those ports are accessible.

What do you see when you run:

netstat -tulpn | grep "/master"

Also, what flavor of Linux are you running?

You have a PUBLIC domain name with a PUBLIC IP address yet you feel for some unknown reason that you need to hide that PUBLIC information from the people you're asking help from.

Say this about a bazillion times: "SECURITY THRU OBSCURITY IS A MYTH (AND A COMPLETE WASTE OF EVERYONE'S TIME)".

_________________
Either provide enough details for people to help, or sit back and listen to the crickets chirp.
Security thru obscurity is a myth - and really really annoying.

Hide public information about my domain - sorry about that.

Main Street James when run: netstat -tulpn | grep "/master" I get this information:

tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 4243/master
tcp 0 0 ::1:25 :::* LISTEN 4243/master

My distribution llinux is CentOS 6.5.

You're listening to "localhost" only. You need to configure /etc/postfix/main.cf "inet_interfaces" setting and restart postfix.

_________________
Rgds
Stephen
(Linux user since kernel version 0.11)

I have set inet_interfaces = all. This is probably correct value.