[Dovecot] folder creation with dots in name

Hello,

i am using dovecot 1.1.7-r1

when i try to create a new folder in incoming with dot in name ist not working fully. when i try to create the folder domain.de, dovecot create domain (gray and not accessable) | ------> de (the de is also created as folder and is accessable)

any ideas why this happen ?

thanks for any hints

marko

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