From the Tools Menu, select Message Filters.

Click the New button.

Fill in a name for the filter, such as Spam Filter. Be sure that Match any of the following is seleted. In the boxes below it there are two drop down boxes followed by a text box to the right. Set this up to read Subject contains SPAM. You will need to type the word SPAM in the text box to the right, in all upper-case letters. Note that we use this keyword because Active Web Hosting's spam filtering will autotmatically put the word "SPAM" in the subject line of any mail regarded as spam. You can use other keywords as well. For more information on keywords to use in your filters, please see Spam Keywords To Add To Your Filter Lists. In the Perform these actions: area, select the Move to folder: option, Local Folders and then click the New Folder button.

Type the word Junk (or Spam or whatever you wish to call your junk mail folder) in the Name: box. Click on the down arrow next to Local Folders, move to the arrow to the right of the words, and select choose this for parent. Click the OK button.

Scroll down to Set Junk Status to: in the Perform these actions: box. From the drop down list to the right, select Junk. Click the OK button when done. You'll see it added to your filter list. When done making up filters, click the "X" button on the upper right of the window to close it.

Thunderbird also has a Junk Mail filter system. To use it, go into the Tools Menu and select Junk Mail Controls. The recommended settings for the Settings tab are:

Whitelists: Click in the box next to Do not mark messages as junk mail if the sender is in my address book: and leave the drop down box set at Personal Address Book.

Handling: Set up for the following: Move incoming messages determined to be junk mail to: "Junk" folder on: Local Folders. When I manually mark messages as Junk: Move them to the "Junk" folder. When displaying HTML messages marked as junk, sanitize the HTML. Note: Leave the Adaptive Filter tab settings at default for best results.