Mark deprecated modules as such.
diff --git a/Doc/library/mimify.rst b/Doc/library/mimify.rst
index c5e1359..da0eacc 100644
--- a/Doc/library/mimify.rst
+++ b/Doc/library/mimify.rst
@@ -4,6 +4,7 @@
 
 .. module:: mimify
    :synopsis: Mimification and unmimification of mail messages.
+   :deprecated:
 
 
 .. deprecated:: 2.3