Home Switchboard Unix Administration Red Hat TCP/IP Networks Neoliberalism Toxic Managers
May the source be with you, but remember the KISS principle ;-)
Skepticism and critical thinking is not panacea, but can help to understand the world better

Postfix Connection Refused Problem

Suse 10.3- Postfix - Connection refused -


I recently came across this problem and after searching for hours I still did not get the entire solution in one thread. I eventually resolved the problem using other information picked up from other threads within the Linux Questions site.

I thought i would make it easier to find in one place by posting my solution here.


After setting up Postfix and configuring the config files, when trying to access the server on port 25 by telnet to the localhost ( we gain access to the server. If you telnet to another interface on the same machine for example 192.168.30.x on port 25 you get "Connection refused".


Edit file - /etc/postfix/

From - #inet_interfaces = all
To - inet_interfaces = all


From - #mynetworks_style = subnet
To - mynetworks_style = subnet


From - mynetworks =
To - mynetworks =,
Edit file - /etc/postfix/
From - smtp inet n - n - - smtpd
To - inet n - n - - smtpd
Then restart the Postfix server:
/etc/postfix/postfix stop
/etc/postfix/postfix start

I hope this helps.

SuSE Re [SLE] postfix connection refused

From: Anders Johansson (
Date: 04/06/04

  • Next message: Martin Mielke: "[SLE] softphone (SIP) with multiple profiles"
    Date: Tue, 6 Apr 2004 14:12:24 +0200

    On Tuesday 06 April 2004 07.46, David Rankin wrote:
    > Pierre,

    > Apr 6 00:21:49 Nemesis postfix/pickup[8054]: 8618118DA95: uid=0
    > from=<root> Apr 6 00:21:49 Nemesis postfix/cleanup[8153]: 8618118DA95:
    > message-id=<>
    > Apr 6 00:21:49 Nemesis postfix/qmgr[815]: 8618118DA95:
    > from=<>, size=306 (queue active)
    > Apr 6 00:21:49 Nemesis postfix/smtp[8155]: connect to
    >[]: Connection refused (port 25)
    > Apr 6 00:21:49 Nemesis postfix/smtp[8155]: 8618118DA95:
    > to=<>, relay=none, delay=0, status=deferred (connect
    > to[]: Connection refused)

    What do you see in /var/log/mail on skyline when this happens?

    > smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
    > smtpd_sasl_auth_enable = no
    > smtpd_sender_restrictions = hash:/etc/postfix/access

    What is in this file?

    Also, can you get mail to work on other machines/other setups? In other words,
    are you sure it isn't your ISP (or some other upstream firewall) filtering
    port 25?

    Check the headers for your unsubscription address
    For additional commands send e-mail to
    Also check the archives at
    Please read the FAQs:

  • Etc

    The Last but not Least Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. Ph.D

    Copyright 1996-2018 by Dr. Nikolai Bezroukov. was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) in the author free time and without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.

    FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.

    This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...

    You can use PayPal to make a contribution, supporting development of this site and speed up access. In case is down you can use the at


    The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the author present and former employers, SDNP or any other organization the author may be associated with. We do not warrant the correctness of the information provided or its fitness for any purpose.

    The site uses AdSense so you need to be aware of Google privacy policy. You you do not want to be tracked by Google please disable Javascript for this site. This site is perfectly usable without Javascript.

    Last modified: July 28, 2019