With IMAP, the mail client shows you what is on the server. If you put something into a folder in Thunderbird, it copies this to the server. So, in principle, a common shared Inbox isn't possible. The messages from accounts B and C would get copied up to account A, and vice versa.

We can approximate a communal Inbox. The built-in solution is to use Unified Folders, which creates virtual folders.

View|Folders|Unified

So you'll have a composite Inbox folder, and ditto for folders common to all accounts: Sent, Drafts and Trash/Bin/Deleted. It fails where you have unique folders in one or more accounts, since it doesn't know what else to blend them with.

I prefer a do-it-yourself approach which is pretty much the same technology; this is a Saved Search folder, where you create your own new folder which combines the contents of other folders. So not only can you have a common Inbox, but also a folder for all Unread messages, or messages involving specific correspondents, or pertaining to a specific project or interest, across a range of accounts.

https://support.mozilla.org/en-US/kb/using-saved-searches

Thanks Zenos,

I have tried this and the problem I have found is that the messages do not appear on other devices. I think possibly because I have played around with the configuration so much. I will attempt to work on this as I think Thunderbird should be able to deal with my requirements.

I will come back and give an update after a late night on it! :)

Thanks

Mark

Thanks Zenos,

Deleted my accounts from Thunderbird and started again fresh... Went straight to do View|Folders|Unified and checked both incoming mails and outgoing mails on other computers and all mails now showing.

Have several emails to set up and will get these done over the weekend.

I think reading your post gave me the confidence knowing that unified folders must work! :)

A virtual beer to you!