Hello, > unixhierarchysep: true > > so you need to use slashes instead of "."s. e.g > > cm user/test thanks. I was treating "user." as a fixed prefix until now, not as a folder. I now successfully created a mailbox: > lm user/test at test.de (\HasNoChildren) > lam user/test at test.de test at test.de lrswipcda Regards Marten