This guide shows you how to install the free version of GoSMTP. The core features of GoSMTP come from the free version. There are two ways to install the GoSMTP Plugin :
1) Install from WordPress Dashboard
From your WordPress dashboard go to Dashboard > Plugins > Add New
Now in the search field search for GoSMTP, choose GoSMTP – SMTP for WordPress and click Install
After installation is done click on Activate
2) Install from Gosmtp Website
Go to gosmtp.net website and click on Get GoSMTP button to download the plugin
Now go to WordPress Dashboard > Plugins > Add New
Click on Upload Plugin and select your downloaded zip file from GoSMTP website.