diff --git a/.emacs.d/init.el b/.emacs.d/init.el
index ab2cf03..0feb084 100644
--- a/.emacs.d/init.el
+++ b/.emacs.d/init.el
@@ -63,6 +63,11 @@
 (add-hook 'lisp-data-mode-hook 'indent-spc-hook)
 
 (setq fill-column 74)
+
+;; file extensions
+(add-to-list 'auto-mode-alist '("\\.eml\\'" . mail-mode))
+(add-to-list 'auto-mode-alist '("\\.scd\\'" . markdown-mode))
+
 ;; treesitter modes
 (setq major-mode-remap-alist
   '((c-mode . c-ts-mode)