If you have an imap mail account then the 'Spam' folder will be a server default folder. That means the server itself could be marking emails as spam and putting them in the Spam folder.

First determine what is putting email in 'Spam'. In Spam folder - enable the 'Spam' column header, so you have a specific column for 'Spam'. It will then show a 'flame' icon for each email in list. If the 'flame' icon is grey then the server spam filter put email in 'Spam' which got downloaded when imap Spam folder synchronised with server Spam folder. If 'flame' icon is red/orange then Thunderbird put it in Spam.

For those emails sent to you from @unitedwithisrael.org is that flame icon grey or red ?

Each account should have it's Junk Settings set up. I'm not sure what you have done - have you set up your address books to act as a whitelist for contacts or maybe you have a setting which says if server spam filter says it's spam then tell Thunderbird to mark as spam?

Please check your Junk Settings.

• In 'Account Settings'
• Select 'Junk Settings' for account

Advise you set up as follows:

• Select 'Enable adaptive junk mail controls for this account'
• Select checkbox for any address book that you want to use as a whiltelist - basically contacts are good.

Advise do not Select ' Trust junk mail headers set by X' unless you really want to because if server spam filters say it's junk then Thunderbird will follow your rule and also mark as junk. Then it's harder to detect who is marking as spam.

Destination and Retention

• Select 'Move new junk messages to'

Not sure if you have pop or imap so.... IF POP account:

• Select: 'Junk folder on' and name of pop account.

IF IMAP account:

• Select 'Other' and choose the correct name of server folder eg: 'Spam on imap account'

Please note - many servers will auto empty the Junk/Spam folder periodically. Some do it once a week, others once a month. You might want to set up your own to delete junk older than x, but since good mail could end up in junk/spam, personally I would advise you do not select that option and instead empty the Junk manually via a right click on Junk folder and selct 'Empty Junk' after you have checked it. Then please remember to Right click on Junk and select 'compact' to remove all traces of old emails.