Depends upon what type of mail account you use.

If you use IMAP then it is not possible as the folders show a remote view of those on the server. Unified View will display all Incoming mail in one Inbox.

If you use POP mail accounts then it is possible to create a 'Global Inbox' deferred mail account which uses the 'Local Folders' Inbox for all pop mail accounts set up to work that way. If this was set up, then you will not see individual pop mail accounts in the left Folder Pane, only a 'Local Folders' account.

So before advising any further, I need to know if you have POP or IMAP mail accounts and how many are pop and how many are imap?

some is POP and other 4 accounts is IMAP !

At the moment, 'Unified View' does show one Inbox containing all incoming mail with the option to show all the individual Inboxes by clicking on the small triangle to show like subfolders. Obviously you do not have to have them showing.

If you want to put all the POP mail accounts into a Global Inbox Local Folders, you would lose the view of individual pop mail accounts, but still have all the Imap mail accounts as separate accounts. So, Unified View will still be the only option to amalgamate them into one inbox view.

In your situation - having both pop and imap - I'm not so certain it is worth the effort.

However, if you want to proceed with changing all the pop mail accounts then this is how you do it.

This link explains the process:

• http://kb.mozillazine.org/Global_Inbox

I would advise that you go into 'offline' mode first as this will stop all synchronising and accessing of Inboxes for all accounts and prevent accidental download whilst you are modifying the Account Settings etc.

Use the section called : Changing the Global Inbox setting for an existing account Do this step by step checking all sections in the order specified.

You must follow the the first two sections for each pop mail account:

• Change the destination Inbox
• Check settings for other folders and filters

Finally complete the last section.

• Exit and restart Thunderbird

It is very important to restart Thunderbird before downloading anything, hence why I suggest you do this in 'offline' mode. After making all the changes, close and restart Thunderbird and it should restart in normal online mode. If you fail to do this, it will still show all the pop mail accounts as separate mail accounts and put mail into Local Folders. Not the desired result.