Mail Server

Install mail server on Ubuntu or Debian

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Disclaimer:
This howto is tested on Ubuntu 16, 18, 20 and Debian 10, 11 edition.

Installing and configuring  postfix

Step 1 » Assign static IP and hostname and add a host entry for the host name .

Assign hostname in /etc/hostname

mail.tweenpath.net

Add a host entry in /etc/hosts

192.168.1.10 mail.tweenpath.net

Step 2 » Update the repositories.

tweenpath@mail:~$ sudo apt-get update

Step 3 » Install postfix and dependencies . Press enter for all prompted questions during installation. we will do that in the next step.

tweenpath@mail:~$ sudo apt-get install postfix

Step 4 » After installation issue the below command to configure postfix.

tweenpath@mail:~$ sudo dpkg-reconfigure postfix

Now you will be prompted for set of details . choose the following values and replace tweenpath.net with your domain name.

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Setup mail server on centos 7 using postfix and dovecot

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Installing packages

Step 1 » Assign hostname for the server using the below command.

[root@krizna ~]# hostnamectl set-hostname mail.krizna.com

Step 2 » Make a host entry with your IP in /etc/hosts file.

172.27.0.51 mail.krizna.com

Step 3 » Now start installing packages.

[root@krizna ~]# yum -y install postfix dovecot

After package installation continue with postfix configuration.

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Group-Office installation on Debian 6.x

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I used the auto installation as guided by the group-office wiki. However, for conveniences, quoting the contents once again:

Easy installation on a dedicated Debian or Ubuntu server

This is the easiest way of installing Group-Office. With the debian packages everything is configured automatically and Group-Office updates will be installed automatically when you update your Debian or Ubuntu system.

Install Debian >= 5 or Ubuntu >=8.10

Note: All the commands here use "sudo". This is necessary on Ubuntu. If you are on Debian you can use the "su" command first and execute all the commands without "sudo".

Add the following line to /etc/apt/sources.list

deb http://repos.groupoffice.eu/ threeseven main

You can do that easily by executing the following command in the terminal:

echo -e "\n## Group-Office repository\ndeb http://repos.groupoffice.eu/ threeseven main" | sudo tee -a /etc/apt/sources.list

To authenticate the packages you need to import the public key by running the folowing commands: In ubuntu don't do this as root because you will have trouble with the gpg keyring permissions. On debian you can do this as root and omit the sudo command before the apt-key add command.

gpg –keyserver hkp://keyserver.ubuntu.com:11371 –recv-keys 01F1AE44

gpg –export –armor 01F1AE44 | sudo apt-key add –

Note: The keyservers are often very slow. If the keyserver doesn't respond you may try this one instead: hkp://pgp.mit.edu

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