You can download the latest version of Thunderbird from https://www.mozilla.org/en-US/thunderbird/.
- If this is the first time you are running Thunderbird, the program will prompt you to set up a new account, and you can skip to step 3. If not, you will need to navigate to this menu yourself.
- Depending on your version of Thunderbird, you may see a toolbar with "File", "View", "Go", "Message", and other options. If not, click the menu button in the upper right corner (just beside the search bar). Then, click "Options", then "Account Settings". In the lower left-hand corner, click the "Account Actions" button, then "Add Mail Account...".
- Thunderbird may ask you to either choose a new email address or use an existing one. Click the button in the bottom left corner, "Skip this and use my existing email".
- On the next section, enter the name you would like displayed, your full email address - firstname.lastname@example.org - and your password. If you do not want to type in your password each time you check your email, check the box next to "Remember password". Click "Continue".
- Thunderbird will search for common configuration settings, but you will need to click the button labeled "Manual config" and change these settings to those in steps 6 - 10.
- On the first row, Incoming Settings, click the dropdown directly to the right of "Incoming:" and select "POP3".
- Click the dropdown to the right under "SSL" and select "None".
- Click the next dropdown to the right under "Authentication" and select "Normal password".
- On the next row, Outgoing Settings, click the last dropdown, under "Authentication", and select "Normal password".
- On the last row, Username, enter only your username - not including '@yourdomain.com'.
- Click "Done".
- IMPORTANT - when finished, click "Done", not "Re-test".
- If you are shown a message warning you that the servers do not use encryption, simply check the box next to "I understand the risks." and click "Done" in the lower right-hand corner.
- If you are still in the Account Settings menu, click OK to exit to Thunderbird's main menu.