Email marketing services allow you to use marketing methods that target directly the people who are most interested in what you are offering. It allows you to build a targeted list by having your website visitors join a mailing list so you can stay in touch with them after they leave.

Professional Email marketing services are offered at different prices and offer different functions depending on the desires. In general, it is best to use paid services rather than free ones. 

Image Source: Google

There are many reasons for this, including a much higher rate of email delivery, more features, and the ability to grow your list with your business. You also don't have to worry about free websites suddenly going offline taking with it all the subscribers you've worked hard to generate.

Email marketing services typically include automated replies or the ability to send bulk emails to all of your subscribers. Auto-reply allows you to create a series of messages that will be sent to your messages once a subscriber joins your list.

It is typically used to first introduce readers to what your newsletter has to offer and then at different intervals to post pre-written content such as electronic courses on a specific topic.