diff --git a/runtime/indent/mail.vim b/runtime/indent/mail.vim
new file mode 100644
index 0000000..6246b40
--- /dev/null
+++ b/runtime/indent/mail.vim
@@ -0,0 +1,13 @@
+" Vim indent file
+" Language:	Mail
+" Maintainer:	Bram Moolenaar
+" Last Change:	2009 Jun 03
+
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+" What works best is auto-indenting, disable other indenting.
+" For formatting see the ftplugin.
+setlocal autoindent nosmartindent nocindent indentexpr=