1. In Mozilla Thunderbird, from the File menu at the top, hover over the New menu and choose Mail Account... from the sub menu.

2.  A Mail Account Setup window will open.  Enter your details into the form and click Continue when finished.

3. Thunderbird will attempt to detect which settings should be used by default.  Once it has finished, Click Edit.

4a. Enter your information into each section as follows:

• Username: The username provided to you by iboza.
• Incoming: This will be mail.{yourdomain} where {yourdomain} is the domain name associated with your email account.  Example: mail.iboza.net or mail.example.com. Select POP from the dropdown list, enter 110 for the port, and select STARTTLS from the final dropdown list.
• Outgoing mail server (SMTP): This should be the same as the Incoming settings above.  Enter 587 for the port, and select STARTTLS from the final dropdown list.

4b. Click Re-test Configuration.

5.  If everything has been entered correctly, you should see a screen similar to the image below.  Click Create Account.

6a. Thunderbird will ask about a security exception.  This is normal.  Wait until it has gathered the information.

6b. Select the option at the bottom labelled Permanently store this exception if not already checked.  Click Confirm Security Exception.

7a.  The first time mail is sent, it will fail.  A security exception window will show again as in step 6.  This time for outgoing mail.  Follow the same procedure as in step 6.

7b.  Once the exception has been confirmed, attempt to resend the mail again and it should succeed.