Send and Receive outside local machine

[motheeb]

Hi folks,

I am new to email servers and configurations. Basically I have just purchased a dedicated Fedora Linux Server with Postfix as the installed mail server. I am hosting a domain and website on this dedicated server. I have setup a couple of email addresses. Now I can send an email from one to another, but I can't send an email to any other domain like a hotmail address. I can receive emails fine however. I understand that I can add domains to "relay_domains" in main.cf. E.g. when I add hotmail.com to "relay_domains" then I am able to send email only to hotmail email addresses.

How can I configure my email server to be able to send emails to any email address at any domain?

Many Thanks

 

[lgarner]

The first place to look is "mynetworks". By default, hosts on networks included in that list are allowed to relay freely.

 

[motheeb]

Thanks for your reply. What should the value for mynetworks be? I tried "127.0.0.0/255.255.255.255" but this is not working I am getting an SMTP connection refused error now.


Many Thanks

 

[lgarner]

That depends on what your networks are. 127 has a special use. What is the IP address range of the computers that will be sending e-mail? That's what needs to go in there, like this:

$mynetworks = 127.0.0.1/32, 192.168.1.0/24, 172.16.4.0/23

This tells Postfix that these networks are trusted and are allowed to relay mail through it without authentication.