--- a/dovecot-example.conf	Fri Dec 22 01:54:17 2006 +0200
+++ b/dovecot-example.conf	Fri Dec 22 16:20:36 2006 +0200
@@ -409,6 +409,14 @@
 # the performance much better, and it's unlikely to have any side effects.
 #maildir_copy_with_hardlinks = no
 
+# When copying a message, try to preserve the base filename. Only if the
+# destination mailbox already contains the same name (ie. the mail is being
+# copied there twice), a new name is given. The destination filename check is
+# done only by looking at dovecot-uidlist file, so if something outside
+# Dovecot does similar filename preserving copies, you may run into problems.
+# NOTE: This setting requires maildir_copy_with_hardlinks = yes to work.
+#maildir_copy_preserve_filename = no
+
 ##
 ## mbox-specific settings
 ##