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Build Your Email Server In 5 Simple Steps As A Professional With Free Tools

Build professional Email Inbox

This tutorial of building an Email server will help to create a complete professional server that including

  • Blog host (WordPress)
  • Production Email inbox
  • Free SSL Certificate

All in 5 simple steps using free tools.

We will ensure that our Email server is high-quality configured as a professional one that can send all emails to the recipient inbox folder, not the spam one.

Of course, to complete this tutorial, we need our domain name, and so you can select one from or any Domain name hosting provider that you prefer.

We can build our Email server and the entire server services at the Home/Work Local server device.

But for the stable state purpose of the services, it's preferred to use cloud hosting services.

For this tutorial, I will use a Ubuntu 20.04LTS 2G Ram VPS (Virtual Private Server) at is about 10USD/monthly.

I get a new XYZ domain name is about 1USD/Year, and Creating a new VPS with public IP address, don't forget to change the domain name, IP address, and all required values with your own during the configuration steps.

1- Install Virtualmin The Open Source Server Control APP.

Virtualmin is a web-interface hosting server manager and control panel. It's an open-source and community support software.

Login To our server as root and start Installing Virtualmin as following

– Update the Ubuntu server by running the following commands

#apt update
#apt updated

– Install Virtualmin by running the following commands

# wget
# chmod +x
# sh

Virtualmin install

You have to accept and continue the installation process and will need to enter your host FQDN.

And we will name it as [don't forget to replace with your domain name.]

▣□□ Phase 1 of 3: Setup
[ERROR] Your system hostname localhost is not fully qualified.
Please enter a fully qualified hostname (e.g.:

And installation process will continue to configure and finish as below

[SUCCESS] Installation Complete!
[SUCCESS] If there were no errors above, Virtualmin should be ready
[SUCCESS] to configure at (or
[SUCCESS] You'll receive a security warning in your browser on your first visit.

You can access your server now using your public IP address at port 10000. I can use my VPS information and access my Virtualmin at , and don't forget to replace the VPS Public IP address with yours.

For the first visit, when trying to log in to Virtualmin, you will need to accept the risk and add an exception to your server's private SSL certificate. Later we will create a public signed one.

Also, note that It's better to use the Firefox browser as it does not require more settings to ignore self-signed SSL checks.

Access Virtualmin Firefox

The first thing to do at your Domain name hosting provider is to transfer your domain DNS records hosting to your server. Yes, we will host our DNS records.

OK, If you are on go to the domain details page and select Nameserver Registration Account Transfer from the Advanced Section. change nameserver registration

Then create ns1 and ns2 name server registers for our domain name.

register own name-server

And after creating the registers ns1 and ns2, we will enter them as  NameServers in the Domain Details Pages, NameServers Section => Manage NameServers. manage nameservers

The same options will be available from any other Domain name hosting provider but under different labels and sections.

Now return to our Virtualmin control panel, and after login for the first time, it will run the post-installation wizard. We can accept all default values except for the MySQL server password, best have to change it to our chosen password, and for the DNS configuration wizard step, we will enter our ns1 and ns2 nameservers registers as primary: and for the secondary:

With check the Skip check for resolvability option.

Virtualmin nameserver config

After finishing this step, the next one will be the Create Virtual Host step

We will select the option of Create server with domain: and make sure our value is our domain name and not the mailsub-domain.

And another option is to create our domain signed SSL with the Let's Encrypt certificate. We need to select it as Yes.

virtualmin create virtual host

After this step, you may get interrupted because of changing of SSL certificate usage.

Note: If you missed the Post-installation wizard for any reason, you can run it again from sidebar menu select System Settings => then Press Re-Run Install Wizard as shown in the below image

Virtualmin Check-config and re-run wizard

After finishing the Post-installing wizard, we can check our server configuration by selecting the System Settings menu item from the sidebar menu, then Re-Check Configuration.

Now all the required packages are installed with basic Configuration.

And we will add more adjustments to ensure that our Email server works professionally and is ready for production.

2- Adjustment Email Server Settings And Configuration

The most critical settings to ensure all sent emails will reach the client or recipient inbox

1- Setup RDNS (Reverse DNS) with FQDN For Your Email Server

To setting the RDNS option in Linode VPS, you need to go to the network tab from the VPS details page => Then select Edit RDNS = > and enter your host FQDN:

You need to set RDNS for both public IPv4 and Public IPv6 addresses.

linode setup rdns

If not on Linode, you can ask support to adjustment your VPS RDNS. I remember that considers the RDNS value as your VPS label.

2- Setting-UP SPF, DKIM, and DMARC Records For Your Email Server

It's a piece of cake settings while using Virtualmin.

SPF (Sender Policy Framework) record: is a DNS TXT record that tries to prevent phishing using your domain name by telling Email providers the correct server IP address that you will use to send email from or which MX servers you are permitted to send emails for you.

DKIM (DomainKeys Identified Mail) Record: is a DNS TXT record that gives any output email from your server a signature header, as a private key certificate that pairs with your domain public key certificate.

So It can expose to Email providers if the email received from you gets altered or if it comes from a none authenticated email server.

DMARC (Domain-based Message Authentication) Record: This is a DNS TXT record that tries to prevent malicious behavior by validating emails further by matching the validity of SPF and DKIM records.

dmarc dkim spf settings

From the left sidebar menu, select Server Configuration => DNS Options.

On the DNS Options page, make sure you select Yes for SPF record enabled and Yes for DMARC record enabled, then press save.

Enable DNS Records for IPv6:

From the left sidebar menu, select Server Configuration => Change IP ADDRESS.

Then in the New IPv6 Address section, select the shared address options and then Press Change Now

DNS For IPv6

From the left sidebar menu, select Email Settings => DomainKeys Identified Mail.

Then Press Install Now

Domain Key Identifier Mail

Then after finishing, press the same menu item again, and make sure to set Signing of outgoing Mail Enabled to Yes, Then press Save.

Domain Key Identifier Mail Enable

3- Enable Let's Encrypt SSL Certificate

From the left sidebar menu, select Server Configuration => SSL Certificate => Let's Encrypt Tab.

Then Press Request Certificate

Enable lets encrypt ssl certificate

Now all technical works are finished, and you still need to select your preferred Webmail client.

Just in one click, and from the same place, we can install the Webmail client and our WordPress blog website next click.

3- Select Email Server Client And Install Your WordPress Blog

We have 2 of the best Webmail clients RoundCube and SquirrelMail. We will select RoundCube Client, but first, we need to enable Mysql Server for our virtual host.

From the left sidebar menu, select the Edit Virtual Server menu item => Enabled features,

Then Select MySQL database enabled , and press Save Virtual Server.

To Install the Webmail Client, select the Install Scripts menu item from the left sidebar menu.

Enable Email Server Inbox Client

Select RoundCube, then press Show Install Option, Then press Install Now, in the script option page.

Install RoundCube Script

Note that to access your inbox using RoundCube Webmail client, you will use the path, as the option of Install sub-directory under

RoudCube login

To control all Email accounts under your domain name virtual host, i.e.add new, modify, set specific quota, or delete. go to the left side menu and select Edit users to get into Mail and FTP Users

Any way Virtualmin creates an automatic email user with the automatic name (the domain name) else if you change it.

Virtualmin Edit User

If you missed your primary mail account password, you could get it by opening the Edit Virtual Server menu item from the sidebar menu, Then go to the Configurable setting tab, then Click on admin Icon beside the Administration password option

Virtualmin Edit User

4- Setup Your Mail Client APP

To use your account with email clients on your mobile phone or desktop APP, you need to configure your client with the server information of the IMAP and SMTP as the following:

The server for imap and SMTP is:
For IMAP: Set [ SSL: Yes, and Port: 993]
For SMTP: Set [SSL: Yes, Requires Authentication: Yes, Prot: 465]
For Authentication: Use your Email and Passord

Hover we can Enable Email Client Autoconfiguration, from sidebar menu select Email Setting => Mail Client Configuration Then, select Yes forEnable mail client autoconfiguration?, and then press Save.

This will help Autoconfig with all Email clients (Only use the email address and password) by adjusting your Email Server DNS settings.

mail client autoconfig
5- Install Your Blog

To install your WordPress blog, from the left sidebar menu, select the Install Scripts menu item => Available Scripts Tab => Then select WordPress, Then press Install Now

Install WordPress Script On Virtualmin

If  you want to access your WordPress directly under the main domain URL as, you need to select Install sub-directory under public_html At top level or choose your preferred blog path.

Install Wordpress Virtualmin

Select your language then, Continue.

Install Wordpress Virtualmin

After entering your website information, Press Install WordPress then Login, installation is simple that will be processed without asking you about database information. It will use the default values that passed to it from Virtualmin.

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