What are the Benefits of Using Open-Source Email clients? An email client must be connected to the Internet and configured to access your service provider's email servers. The Email client is extremely useful It can be used to send or receive new emails. The Email client is a software program that you can install on your computer that allows you to interact with an email server. It should be licensed under one of the known open-source licenses, such as GPL, MIT, and others. The difference between commercial email clients and open-source email clients is that the library that used. However, our article here is about macOS desktop mail clients, but first let's talk about open-source email client. Webmail and email clients are two ways that you can send and receive emails. You can think of an email server like the post office where your mail is collected and stored until it's delivered to you. Webmail (web-based email) is an email service that can be accessed by using a standard web browser. They are meant that an email server can belong to a Webmail. Let's say that all emails travel over the internet and are stored on email servers. An email client software is as its name implies A way of retrieving your mail from your provider's servers and downloads it to your computer's hard drive Once the client has retrieved your email, you can read it at your convenience and continue to access it even when you are not online.