- Rmail was written to use Babyl format as its internal format. Since
-then, we have recognized that the usual inbox format on Unix and GNU
-systems is adequate for the job, and we plan to change Rmail to use that
-as its internal format. However, the Rmail file will still be separate
-from the inbox file, even when their format is the same.
+ Rmail was originally written to use Babyl as its internal format.
+Since then, we have recognized that the usual inbox format on Unix and
+GNU systems is adequate for the job, and so since Emacs 23 Rmail uses
+that as its internal format. The Rmail file is still separate from the
+inbox file, even though their format is the same.