To synchronize calendars and contacts between a SmarterMail user account and Mozilla Thunderbird 2, you will need to download and install the Lightning and Funambol plug-ins for the Thunderbird email client.

There are two methods for downloading and installing the required plugins:

Option One

1. Download the Lightning plug-in from Thunderbird Add-ons and save the plug-in to your desktop.
2. Start Thunderbird and go to Tools -> Add-ons -> Install. Then select the Lightning plug-in, which you should have saved on your desktop, and click Install Now.
3. Exit and restart Thunderbird.
4. Download the Funambol plug-in from Thunderbird Add-ons and save the plug-in to your desktop.
   IMPORTANT NOTE: This plug-in is currently in beta, so you will need to log in to the Mozilla site in order to download the plug-in.
5. Start Thunderbird and go to Tools -> Add-ons -> Install. Then select the Funambol plug-in, which you should have saved on your desktop, and click Install Now.
6. Exit and restart Thunderbird.

Option Two

1. Start Thunderbird and go to Tools -> Add-ons -> Get Extensions. This will open your browser (or a new browser window if your browser is already open) and take you to the Thunderbird Add-ons Web site.
2. From the Thunderbird Add-ons site, search for the Lightning plug-in. Click Download Now and save the plug-in to your desktop.
3. From the Thunderbird Add-ons site, search for the Funambol plug-in. Click Download Now and save the plug-in to your desktop.
   IMPORTANT NOTE: This plug-in is currently in beta, so you will need to log in to the Mozilla site in order to download the plug-in.
4. From the Thunderbird interface, go to Tools -> Add-ons -> Install. Then select the Lightning plug-in, which you should have saved on your desktop, and click Install Now.
5. Exit and restart Thunderbird.
6. In Thunderbird and go to Tools -> Add-ons -> Install. Then select the Funambol plug-in, which you should have saved on your desktop, and click Install Now.

After installing the plug-ins, you will need to configure the Funambol plug-in using the following steps:

1. From the Thunderbird interface, go to Tools -> Funambol Plug-in -> Options.
2. Enter the server location into the server URL field using the format http://mail.yourdomain.com/sync/default.aspx
3. Enter your username using the format username@yourdomain.com
4. Enter your account password.
5. Click the Synchronize tab.
6. Select the items that you want to synchronize (contacts and/or calendar).
   IMPORTANT NOTE: To synchronize the calendar, you will need to click the Details button and change the remote name to scal.
7. If you want to schedule synchronization, click Sync Every.
8. Click OK and Click to Synchronize.