1. Download and install Thunderbird at https://www.thunderbird.net/en-GB/
2. Press the ALT on your keyboard to reveal the secret menu
3. Click on "Tools"
4. Then click on "Accounts Settings"
5. Click on "Account Actions"
6. Click on "Add Mail Account"
7. Enter in "Your full Name"
8. Enter in "Email address"
9. Enter in your password
10. Click on "Configure manually"
INCOMING SERVER
11. Protocol: should have "IMAP" selected
12. Hostname: should be your domain name without a dot at the beginning of your domain name
13. The Port: number should be "993"
14. Connection Security: should be "SSL/TLS" or set to auto
15. Authentication method: should be "Encrypted Password"
16. Username: is your email address
OUTGOING SERVER
17. Hostname: should be your domain name without a dot at the beginning of your domain name
18. The Port: number should be "587"
19. Connection Security: should be "STARTTLS"
20. Authentication method: should be "Normal Password"
21. Username: is your email address
22. You may get a message "Password Required for Outgoing (SMTP) Server ............. when you try to send an email. Just re-enter the password.