+the directory to store the content, and the filenames.
+.PP
+By default (or if the
+.B \-auto
+switch is given),
+.B mhstore
+uses filename information, contained in the message, if available.
+(This information should be specified
+as the attribute \*(lqname=filename\*(rq in the \*(lqContent-Type\*(rq header
+for the content you are storing.)
+Only the basename of this filename is considered.
+If it begins with the character '.', '|', or '!',
+or if it contains the character '%', automatic naming won't happen for
+security reasons. (See below for the fall-back.)
+.PP
+Files are