Email Forwarding using Mozilla Thunderbird
All Together
1. Sign in to your email through Mozilla Thunderbird. Select Message Filters from the Tools Menu

2. This will open the Message Filters dialog box. Press New to create a new filter.

3.You should now be in the Filter Rules Dialog Box. You have three different options, you can either Match all of the following, Match any of the following or Match all messages. For this tutorial, I will forward all my messages to another email address so I choose the third option (Match all messages).
On the Perform these actions, change the first drop down box to Forward Message to and type the email address on the second column. Click Ok to finished setup.

