> The "sync the directory" feature is already controlled by "#ifdef > NEED_SYNC_DIRECTORY". So you can edit the relevant OS/os.h-xxx file if
> you want to compile an Exim that doesn't do it. At present, the only
> os.h file that has this set is the one for Linux.
>
> Of course, you should _not_ disable this on Linux when the spool is on a
> local disc.
I asked Trond Myklebust, the Linux NFS client maintainer, and he answered
that there is indeed a bug in NFS fsync(). It will be fixed soon.