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On this site, you will find a step-by-step guide on how to run the mail server Mailcow on CloudPanel.
The mail server Mailcow is a dockerized application that is addressed via Reverse Proxy.

System Requirements
  • >= 1 Core
  • >= 6 GB of RAM
  • >= 20 GB Disk

Disable Postfix

Login via SSH as root and stop and disable the postfix service:

systemctl stop postfix && systemctl disable postfix

Docker Installation

  1. Login via SSH as root:
ssh root@instance-ip-address
  1. Install Docker with Docker Compose with the following command:

Install docker and the docker compose plugin:

curl -sSL | CHANNEL=stable sh && apt install docker-compose-plugin

Mailcow Installation

  1. Clone the Mailcow Git Repository to /opt/mailcow-dockerized:
git clone /opt/mailcow-dockerized
  1. Initialize Mailcow by executing the script:
cd /opt/mailcow-dockerized/ && ./
  1. Set the Mail server hostname (FQDN), e.g.,
Set Mail Server Hostname (FQDN)
  1. Open the configuration file and change the values for HTTP_PORT, HTTP_BIND, HTTPS_PORT, HTTPS_BIND.
nano /opt/mailcow-dockerized/mailcow.conf


Starting Mailcow

To start Mailcow, we go to the directory /opt/mailcow-dockerized/ and launch the docker containers.

cd /opt/mailcow-dockerized/ && docker compose pull && docker compose up -d

Reverse Proxy Configuration

To access Mailcow via our domain, we create a Reverse Proxy and forward the traffic to port 7443.

  1. In CloudPanel, create a Reverse Proxy with your Domain Name and as Reverse Proxy Url.
CloudPanel Reverse Proxy Configuration
  1. Go to your Reverse Proxy and issue an SSL/TLS Certificate.

  2. Done. You can now login with the username admin and password moohoo.

Mailcow Login
  1. For security reasons, we recommend putting a Basic Authentication in front of your Mailcow installation.