thanks for your answer.

There is only 1 Account in Mail.app

I have imigratet from Courier and there I had no Problem with all the settings.

Is it possible that the index file is damaged or something like that ?

Gerhard

Am 28.05.10 17:56, schrieb Timo Sirainen:

On Thu, 2010-05-27 at 10:17 +0200, Gerhard Waldemair wrote:

...

Now I have the problem, that I get mail under Mail.app double. (same header, Message-ID ,...)

When I use Thudnerbird under MacOS there is all OK.

That doesn't make any sense. Only thing I can think of is that you created two identical accounts to Mail.app..

...

Are there some Configs that I need to make for MacOS / Mail.app ?

No.