There are a few pieces that you need to manage your own mail server.
This snap makes the process easy, it will setup most things that
you expect from a mail server. Because the process is automated and
easy expect the installation to be somewhat unflexible.
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Enable snapd
Snap can be installed from the command line. Open the Konsole terminal and enter the following:
sudo apt update
sudo apt install snapd
Install Parcel
To install Parcel, simply use the following command: