Mail accounts don't show up in Thunderbird

I believe that this is by default, that if you don't look carefully when the mail is set up, that there is a small box with a check mark, indicating Global settings.
If you did not notice this, all mail will go into Local Folders.
I, personally, and obviously you, like to have mail from each account in its own place. But, this is not done as a rule. Opera mail piles up all accounts in one Inbox (may be there is a setting there, but I don't know where it is), making it difficult to find e-mails. I know that one way is to create the same account, making sure that the Global Settings is unchecked. I believe that this is after you enter the pop server info. I do uncheck i so automatically that I am not sure where it is, but, just look at what comes up.

 

Glad to have led you in the right direction, and, even better, your figuring out an easy solution. Thanks.