diff --git a/lib/email_sender_extensions.rb b/lib/email_sender_extensions.rb
index a9ed3377..ed363c7e 100644
--- a/lib/email_sender_extensions.rb
+++ b/lib/email_sender_extensions.rb
@@ -1,8 +1,8 @@
 # frozen_string_literal: true
 
 module DiscourseEncrypt::EmailSenderExtensions
-  def add_attachments(post)
-    return if post.is_encrypted?
+  def add_attachments(*posts)
+    return if posts.any?(&:is_encrypted?)
     super
   end
 end