diff --git a/modules/email/wanderlust/config.el b/modules/email/wanderlust/config.el
index 436a7126f..3063b1d6d 100644
--- a/modules/email/wanderlust/config.el
+++ b/modules/email/wanderlust/config.el
@@ -52,6 +52,7 @@
           "^DKIM-.*:"
           "^DomainKey-.*:"
           "^SPF-.*:"
+          "^SMX-.*:"
           "^Autocrypt:"
           "^ARC-.*:"
           "^Authentication-Results:"