![]() You can change the reverse DNS name by visiting your UpCloud Control Panel. Lastly, make sure your reverse DNS is set on your email server’s IP address e.g. This is a live example of the DNS records: You can find out more about how to manage your DNS records at our guide on domain name systems. We will be using the domain name ‘’ as an example, replace it with your own where applicable. Just make sure you are creating a new DNS Domain entry and the following DNS records exist for your domain. Note that you don’t need to register a new domain, you can use any existing one. The port 25 needs to be open, otherwise, your server may be not able to receive or/and send emails. Make sure Port 25 is not blocked: The port 25 is used for communication between mail servers and it is blocked by default for new users on UpCloud.Operating System: Debian 8 – 10 / Ubuntu 14.04 & Higher / CentOS 7.First, you will need to deploy a clean instance of a cloud server with minimum system requirements of at least 2 GB RAM, 2 CPU cores, and 10 GB of storage.However, it does have some requirements you should be aware of: Modoboa can be installed on multiple different operating systems and a wide variety of configurations. In this guide, we’ll show how to install Modoboa on an UpCloud Cloud Server running Ubuntu 18.04 but the instructions can be easily adapted to other operating systems as well. ![]()
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