diff --git a/lacre/daemon.py b/lacre/daemon.py
index 280a7e2..5300d60 100644
--- a/lacre/daemon.py
+++ b/lacre/daemon.py
@@ -63,7 +63,7 @@ class MailEncryptionProxy:
                 if conf.should_log_headers():
                     LOG.error('Erroneous message headers: %s', self._beginning(envelope))
 
-                return xport.RESULT_ERRORR
+                return xport.RESULT_ERROR
 
         return xport.RESULT_OK
 
diff --git a/lacre/mailop.py b/lacre/mailop.py
index 69d6d9b..e6e9344 100644
--- a/lacre/mailop.py
+++ b/lacre/mailop.py
@@ -131,7 +131,7 @@ class KeepIntact(MailOperation):
         """Return MESSAGE unmodified."""
         try:
             return message.as_bytes(policy=SMTPUTF8)
-        except IndexError as e:
+        except (IndexError, UnicodeEncodeError) as e:
             raise MailSerialisationException(e)
 
     def __repr__(self):