To setup Thunderbird start by opening Thunderbird then click on the Thunderbird Menu and move your mouse over to Options and click on Account Settings…
On the bottom right of the Account Settings screen click on Account Actions and click Add Mail Account.
In the empty box next to Your name type your name as you would like it to appear in e-mails you send. In the empty box next to Email address: type in your e-mail address. In the empty box next to Password type your e-mail password. Click the Continue button.
Thunderbird will try to automatically detect your settings. This feature should automatically detect the proper settings as shown below and you can click Done to finish setting up your e-mail account. If the automatic detection does not work click on Manual config.
If your automatic detection failed and you clicked Manual config in the box next to Incoming click the drop down menu and choose IMAP. In the box under Server hostname type mail.amplex.net. In the drop down menu under port choose 993. In the drop down box under SSL choose SSL/TLS. In the drop down box under Authentication choose Autodetect.
In the box next to Outgoing under Server hostname type mail.amplex.net. In the drop down menu under port choose 587. In the drop down box under SSL choose STARTTLS. In the drop down box under Authentication choose normal password. Click the Re-rest button. The settings will be verified then click Done to finish your e-mail setup.
Your e-mail is now setup and you can view your e-mail by opening Thunderbird.