Postfix Problem

UNIX for Beginners Q & A UNIX for Dummies Questions & Answers
1

Hello,

I have a problem remotely connecting to the postfix. It sais "Connection refused".

[root@localhost ~]# telnet 104.200.16.232 25
Trying 104.200.16.232...
telnet: connect to address 104.200.16.232: Connection refused

But the postfix is started and running.

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

Any help?

2

You will need to confirm where you are running these two commands. Is 104.200.16.232 the server that you run the 2nd command on?

Other questions that spring to mind:-

  • What OS and version do you have for each?
  • Is SMTP listening only to the local/dummy network not the public one
  • Is there a network/hardware firewall in play between your two servers?
  • Are there IPSec/ACL rules (software firewall) in play?

A bit more clarity and context might help us to help you.

Kind regards,
Robin

3

What's the value of the parameter inet_interfaces in /etc/postfix/main.cf ? Run one of the following commands to find that out:

$ grep ^inet_interfaces /etc/postfix/main.cf

or (even better)

# postconf inet_interfaces
4

I managed to do it. The "inet_interface" was the problem. Thanks for the assistance.