diff --git a/configuration.org b/configuration.org
index bba966f..aec12b8 100644
--- a/configuration.org
+++ b/configuration.org
@@ -2356,6 +2356,7 @@ accompanying function will be added to ~mu4e-view-mode-hook~.
   (mu4e-completing-read-function 'helm-comp-read)
   (mu4e-context-policy 'pick-first)
   (mu4e-confirm-quit nil)
+  (mail-user-agent 'sendmail-user-agent)
   :hook
   (mu4e-view-mode . gpolonkai/mu4e-trailing-whitespace-fix)
   :bind