diff --git a/lib/email/receiver.rb b/lib/email/receiver.rb
index fc3361c43b5..9fdd47e2b34 100644
--- a/lib/email/receiver.rb
+++ b/lib/email/receiver.rb
@@ -557,6 +557,7 @@ module Email
     end
 
     def trim_discourse_markers(reply)
+      return '' if reply.blank?
       reply = reply.split(previous_replies_regex)[0]
       reply.split(reply_above_line_regex)[0]
     end