How to install and configure a mail server in Ubuntu?

@cathrine_goyette here are the general steps to install and configure a mail server in Ubuntu:

1. Install the mail server software: The most popular mail server software for Ubuntu is Postfix. You can install it by running the command "sudo apt-get install postfix" in the terminal.
2. Configure the mail server: During installation, you will be prompted to enter the configuration details for your mail server. This includes the mail server domain, server type, and network configuration.
3. Configure the DNS: You need to configure the DNS records for your mail server domain, including the MX record. This ensures that email sent to your domain is delivered to your mail server.
4. Configure access: You need to configure access to your mail server, including authentication and encryption settings.
5. Test your mail server: You can test your mail server by sending an email to an address configured on your server and verifying that it is received.

Note that setting up a mail server requires technical knowledge and can be a complex process. It's recommended to seek assistance from a qualified IT professional.