These are the icons that standard accounts have. See the junk one. If yours is not that icon it is a junk folder in name only, not function.

What icon does your folder have?

It is no5 (red) icon

re :But while two addresses sow junk files one is all the time empty. But this address on mail app on iPadAir displays yhe lot od junk messages

Logon to webmail account via a browser: The default folders will be listed at the top: what is the name of the default server 'Spam'/'Junk' folder which contains a load of junk emails. Are they the same junk/spam emails you can see on iPadAir? - please confirm.

In Thundrebird The account not displaying 'junk': What is the problem junk folder actually called eg: 'Junk' or 'Spam' or something similar like 'Spam Mail' ?

What does it say in this location:

• In Account Settings
• Select 'Server Settings' for the problem account

On top right - what does it say for 'Server Type'?

• Select 'Junk Settings' for problem account

Post an image showing all info on the right.

• Select 'Synchronisation & Storage'

What is selected on the right ? Click on 'Advanced' button Is the 'Junk' folder which may be called 'Spam' selected for download?

I used Ticked ID You sent me. Wy it is invalid? Answers to your questions:

1. On AOL in SPAM 15 messages, in iPadAir differnt number, in Thunderbird in Junk zero.

2. Server type is IMAP MAIL TYPE. Was impossoble to set POP3 as it was on old PC.

3. Junk folder settings is the sam for all accounts. JPG file included.

4. Synchronisation and Storage /Advansed on all accaunts had Junk and Trash unchecked. Ceck all of tem. Still empty Junk folder.

I think that is because Thunderbird can not do some tasks with many installed addresses. For example about 5 years ago you can send messages from any of open account. Now only default account is able to setd eemail. But you can read messages from all installed addresses.