(let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
;; If this file exists, we use it directly.
(if (or nnmail-use-long-file-names
(let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
;; If this file exists, we use it directly.
(if (or nnmail-use-long-file-names