diff --git a/trapperkeeper/callbacks.py b/trapperkeeper/callbacks.py
index 22f667c..c8dedc0 100644
--- a/trapperkeeper/callbacks.py
+++ b/trapperkeeper/callbacks.py
@@ -64,7 +64,7 @@ def _send_mail(self, handler, trap, is_duplicate):
         ctxt = dict(trap=trap, dest_host=self.hostname)
         try:
             stats.incr("mail_sent_attempted", 1)
-            send_trap_email(recipients, "trapperkeeper",
+            send_trap_email(recipients, "trapperkeeper@localhost",
                             subject, self.template_env, ctxt)
             stats.incr("mail_sent_successful", 1)
         except socket.error as err: