I followed this tutorial: https://computingforgeeks.com/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-18-04-lts/

I'm trying to setup a send only mail from my Ubuntu 19 server. I followed the guide above and tried to install mailutils using:

apt install mailutils

It installed something but I'm not sure what as the mailutils command doesn't work as seen here:

enter image description here

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I then installed via the following command:

apt install libmailutils-dev

That worked as mailutils command now runs, but I didn't get a GUI interface to select like how the guide shows it:

enter image description here

  • What do I need to do now since the Postfix install GUI didn't popup according to the guide?

  • Also is it an issue if I installed mailutils and then libmailutils-dev?

3 Answers 3


Run dpkg-reconfigure postfix to see the wizard/GUI

  • 1
    Which gave me dpkg-query: package 'postfix' is not installed and no information is available. (Ubuntu 20.04) Use apt install postfix then.
    – BairDev
    Commented Dec 31, 2020 at 8:25

mailutils + postfix is described in quite a few tutorials, so in case someone else has the same problem:

The Ubuntu package changed.
In 18.04 mailutils still included default_mta (which is postfix) as a dependency, therefore it was installed with it.
From 19.10 it is only a recommended package.

The Changelog says:

mailutils (1:3.5-2) unstable; urgency=medium

  * Relax the dependency on a MTA to a recommendation.
    Thanks for the suggestion, - (closes: #916992).


18.04: https://packages.ubuntu.com/bionic/mailutils
19:10: https://packages.ubuntu.com/eoan/mailutils
20.04: https://packages.ubuntu.com/focal/mailutils


In Ubuntu 20 postfix is not installed automatically, so we must do it:

  • sudo apt update
  • sudo DEBIAN_PRIORITY=low apt install postfix

see How To Install and Configure Postfix on Ubuntu 20.04 for more details

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