Postfix - can't send/recieve mails to/from outside world

You are sending from a dynamic IP address:

Almost all dynamic IP addresses are blacklisted nowadays.
You could relay your mails through another mail server: http://www.howtoforge.com/postfix_relaying_through_another_mailserver

 

I started to follow the howto as above but when I entered the command

Code:

chown root:root /etc/postfix/sasl_passwd

I got the following message

Code:

chown: cannot access `/etc/postfix/sasl_passwd': No such file or directory

What went wrong

I have followed the 'Howto' for the Ubuntu Gutsy Server Setup.

I was logged in as root and in the directory '/home/user1'. All preceeding commands went in without reporting any errors/complaining (if it complained it wasn't noticeable).

Oops!! Missed a command

Code:

echo "smtp.example.com   someuser:howtoforge" > /etc/postfix/sasl_passwd

Doh!! It seems to have been configured without complaining. Now for a test!!

 

Success

My mail is now being received by Hotmail.

 

Anyone can tell my what's wrong with the output of my netstat -tap and iptables -L commands? pleaaase!!!!!!!!! (T_T) :'(

 

The output is ok, so I'm not sure where the problem is...

 

testing

Ok, Falko thank you very much anyway.

Well, let's supposing I did all tutorial steps the right way and let's supposing all my ports are open and anything in my server is right , what could be wrong?

I'm in a NAT, so, I have a 10.100.1.27 local IP and an external IP (just for my server), so I can connect to my server with such external IP.

I have one domain configured in my server (ie. myserver.com), I don't use ISPConfig, but I installed it when I followed the tutorial.

The MX settings of my housing service provider (HSP) or something like that?
it could be a problem with my HSP?
What can I ask to my HSP to know that?

Thanks, really thanks in advance.