Setting up Thunderbird 60
This article describes how to set up the Thunderbird 60 email client for Plesk Hosting.
Verify that your credentials work correctly. Consult How to Access Plesk WebMail.
If you need the name of your mail server, consult Finding the hostname of the mail server.
Steps
Launch Thunderbird and click Email under Set up an account
Enter your name, email address, password and click Continue
Enter your mail server hostname for incoming and outgoing servers. Enter your email address for incoming and outgoing Username and then click Done.