re :Junk button on main page is grayed out.

Please post/upload an image showing this. By image that means jpg file. The 'Junk' button would be displayed in the Message Header area of an opened email.

If using 'Table View' have you enabled the 'Spam' column header in the 'Junk/Spam' folder: The Junk/Spam folder will display a flame icon for each email. If it is grey then it means the server has set it as junk If it is red/orange colour then Thunderbird has set up as Junk.

Have you set up the Junk Settings for that account ?

• In 'Account Settings'
• Select 'Junk Settings' for the account
• Select the checkbox: 'Enable adaptive junk mail controls'
• Select any address book you want o act as a whitelist
• Do not select the checkbox 'Trust junkmail header....'

Destination and Retention

• Select 'Move new junk messages to'
• If Pop account selet 'Junk folder on' and select account.
• If Imap account select 'Other' and choose 'Spam on account' (Imap accounts use the server name which is ikey to be Spam)

Junk needs training, so it's important to mark as junk and not junk.

I've set up TB so that nothing should be going into junk folder - All boxex under junk settings are empty - selection/trust junk mail headers/move new junk.... However I've just found that I've had a couple of emails go into junk folder, including a couple from people who are in my address book. This has only just started happening Any suggestions? Thanks

I right click on junk emails and use the button at the top of the menu to mark them as junk but I keep getting mail from the same senders........ I've set up TB so that nothing should be going into junk folder - All boxex under junk settings are empty - selection/trust junk mail headers/move new junk.... However I've just found that I've had a couple of emails go into junk folder, including a couple from people who are in my address book. This has only just started happening Any suggestions? Thanks

You said you have an issue - you mark as junk but keep getting emails from same senders. You will constantly get emails from whomever sends them because the server accepts any emails sent to you and Thunderbird auto downloads them. You have not set up any Junk Settings for the account, so you have not enabled the Junk filter - that means you are not training Thunderbird to know what is or what is not junk/spam. But any manual junk marking by you would only mark things as junk, you would need to have the 'Spam' column header visible in order to know whether it was marked as junk or not, otherwise you would not know the difference.

I would advise that you Set up the Junk Settings as instructed in previous comment. Setting the address books as whitelists means emails from contacts in a whitelist address book should be regarded as good but you need to enable the filter to learn this. When you click on Junk it gets auto moved to the Junk folder, so cleaning up what is otherwise a cluttered view. It also means you can empty the Junk in one go if desired.

You aslo mention - some emails went to junk - this could have some auto settings doing this : Settings > Privacy & Security scroll to Junk. But ideally you want that set up as following:

• Select 'When messages are marked as junk:
• Select 'Move them to accounts Junk folder'
• Select 'Enable adaptive junk filter logging'

If you choose not to set up Junk Settings in account, then marking anything as junk becomes irrelevant because it does not move anything, but it should mark as junk and you would need to enable the 'Spam' column header in order to see what is and what is not junk. Anything manually selected should display with a red/orange flame.

If this is an Imap account then the server can put emails in the server 'Spam' folder which means you would auto see emails in that folder. Thunderbird has no control over what the server puts in the Spam folder.

In addition - please remember to compact folders to remove all old traces of deleted or moved emails. Compact is not the same as compress, so do not be confused. Create folders to store and organise emails because it reduces the risks. If you keep everything in eg: Inbox then that means you have all your emails stored in a single text file. Each email written one after the other in a single document. This is very risky. Do not allow any Anti-Virus to scan and auto fix anything because if they detect one bad email and try to fix - they have no idea the file contains more than one email, so you could end up losing the lot.