--- a/dovecot-example.conf	Sun Dec 02 15:49:05 2007 +0200
+++ b/dovecot-example.conf	Sun Dec 02 16:22:44 2007 +0200
@@ -300,10 +300,9 @@
 # filesystems (NFS or clustered filesystem).
 #mmap_disable = no
 
-# Rely on O_EXCL to work when creating dotlock files. The default is to use
-# hard linking. O_EXCL makes the dotlocking faster, but it doesn't always
-# work with NFS.
-#dotlock_use_excl = no
+# Rely on O_EXCL to work when creating dotlock files. NFS supports O_EXCL
+# since version 3, so this should be safe to use nowadays by default.
+#dotlock_use_excl = yes
 
 # Don't use fsync() or fdatasync() calls. This makes the performance better
 # at the cost of potential data loss if the server (or the file server)