# Requirements

These requirements are for all operating systems.

* [Software/Hardware requirements](#software-hardware-requirements)
* [Network requirements/domain name](#networking-requirements)
* [Security](https://docs.infotopics.com/mailscheduler/getting-started/requirements/security)
* [Database credentials](#database-credentials)
* [SSL Certificate](#ssl-certificates)
* [License](#license-requirement)
* [Installation files](#installation-files)

Each operating system can have different requirements:

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td>Windows requirements</td><td><a href="requirements/windows">windows</a></td></tr><tr><td>Linux requirements</td><td><a href="requirements/linux">linux</a></td></tr></tbody></table>

### **Software/Hardware Requirements**

* Minimum hardware requirements:&#x20;
  * 4 (v)CPU, processing power
  * 8Gb RAM
  * 50Gb application disk space
  * 100Mbps or 1Gbps network-interface
* Temporary Internet Access for downloading missing component

### Network requirements

Firewall rules allow access to the port where the application will run. This applies to both internal and external networks, as well as server firewalls.

Ensure a valid web domain is available for the MailScheduler application to serve and distribute its content. When selecting a domain, it's important to consider how the application will be made available:

* Only within the internal/company network. This could be the machine/server name. The network DNS server will handle the request internally.
* Customers/users can use the MailScheduler application outside of the network. A web domain, for example, `<https://extension.company.com>` (create a DNS entry) which points to the host of MailScheduler.
* Ensure the server is accessible solely via a VPN or within the company's internal network.
* Read the security page and make sure you are compliant: [here](https://docs.infotopics.com/mailscheduler/getting-started/requirements/security)

{% hint style="info" %}
When using a network/internal domain, the traffic of MailScheduler is available exclusively within the network (e.g., via VPN). Users outside the network cannot access the MailScheduler application.
{% endhint %}

### **Database Credentials**

Access to a running database is required. Supported databases include:

* SQL Server, minimal version 2019 or newer
* MySQL, min. version 5.7 or higher
* PostgreSQL
* SQLite

### **SSL Certificates**

SSL Certificates are optional unless you're not running the system behind a proxy/load-balancer.

We support the following SSL certificates:

* Using a `.key` and `.cer` certificate via the public keys method.
* Using a `.pfx` Windows-style certificate.

### **License Requirement**

A valid License for MailScheduler. The license can be found in our [portal](https://my-appsfortableau.infotopics.com/login).

### **Installation files**

One-Click Executable files for easy installation. These files can be downloaded via our [portal](https://my-appsfortableau.infotopics.com/login).

<table data-card-size="large" data-view="cards" data-full-width="true"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Next</strong></td><td>Getting started</td><td><a href="getting-started">getting-started</a></td></tr></tbody></table>