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Changes
→Thunderbird's Junk Mail Controls
* ''Do not mark messages as junk mail if the sender is in my address book'' prevents messages from being automatically marked as junk mail if the sender is listed in the selected address book. This is effectively a White List of contacts whose messages should never be treated as junk mail, and is often most useful when combined with the ''Automatically add outgoing email addresses to my Address Book'' option.
* ''Trust junk mail headers set by'' will automatically recognize mail that is marked by a separate junk mail filtering program. Very often, your ISP or mail server will install such a filtering program, which adds special headers to your email before it is retrieved by Thunderbird. By setting this option, you do not have to create special filters to recognize these. Currently supports: SpamAssassin and SpamPal.
**If SpamAssassin is selected, the filter checks the content of the X-Spam-Status and X-Spam-Flag headers, as well as whether **SPAM** has been inserted in the subject line of the message.
**If SpamPal is selected, the filter checks the value of the X-SpamPal header.
**Thunderbird reads the settings used to look for junk mail headers from files with a .sfd extension that are in the Thunderbird profile directory.
; Handling : Determines what to do with junk mail when it is received
* ''Move incoming messages determined to be junk mail to'' will automatically place junk mail into the specified folder upon arrival
