--- /dev/null
+#! /bin/sh -e
+
+if [ -z "$1" ]; then
+ echo "Usage: $0 <mbox>" >&2
+ exit 1
+fi
+
+maildirmake "$1.maildir"
+perfect-maildir "$1.maildir" < "$1"
+mv "$1" "$1.mbox"
+mv "$1.maildir" "$1"
+
+echo "$1 converted to maildir and preserved as $1.mbox"
+
+exit 0