diff --git a/lacre/core.py b/lacre/core.py
index 0b1d01e..f5eb3ce 100644
--- a/lacre/core.py
+++ b/lacre/core.py
@@ -506,6 +506,7 @@ def _is_encrypted(raw_message: email.message.Message):
 def delivery_plan(recipients, message: email.message.Message, key_cache: kcache.KeyCache):
     """Generate a sequence of delivery strategies."""
     if _is_encrypted(message):
+        LOG.debug(f'Message is already encrypted: {message!r}')
         return [KeepIntact(recipients)]
 
     gpg_to, ungpg_to = _identify_gpg_recipients(recipients, key_cache)
diff --git a/lacre/text.py b/lacre/text.py
index bdbc3e0..84f8939 100644
--- a/lacre/text.py
+++ b/lacre/text.py
@@ -8,9 +8,10 @@ from email.message import Message
 
 # The standard way to encode line-ending in email:
 EOL = "\r\n"
+EOL_BYTES = b"\r\n"
 
-PGP_INLINE_BEGIN = b"-----BEGIN PGP MESSAGE-----"
-PGP_INLINE_END = b"-----END PGP MESSAGE-----"
+PGP_INLINE_BEGIN = EOL_BYTES + b"-----BEGIN PGP MESSAGE-----" + EOL_BYTES
+PGP_INLINE_END = EOL_BYTES + b"-----END PGP MESSAGE-----" + EOL_BYTES
 
 
 LOG = logging.getLogger(__name__)
diff --git a/test/daemon_test.py b/test/daemon_test.py
index d529acd..8488eef 100644
--- a/test/daemon_test.py
+++ b/test/daemon_test.py
@@ -65,9 +65,19 @@ def _load_test_config():
     return cp
 
 
-def _report_result(message_file, expected, test_output):
+def _identity(x):
+    return x
+
+
+def _inversion(x):
+    return not(x)
+
+
+def _report_result(message_file, expected, test_output, boolean_func=_identity):
     status = None
-    if expected in test_output:
+    expected_line = "\r\n" + expected  # + "\r\n"
+    cond_met = boolean_func(expected_line in test_output)
+    if cond_met:
         status = "Success"
     else:
         status = "Failure"
@@ -91,7 +101,10 @@ def _execute_case(config, case_name):
     test_out = test_out.decode('utf-8')
     logging.debug(f"Read {len(test_out)} characters of output: '{test_out}'")
 
-    _report_result(config.get(case_name, "in"), config.get(case_name, "out"), test_out)
+    if 'out' in config[case_name]:
+        _report_result(config.get(case_name, "in"), config.get(case_name, "out"), test_out)
+    else:
+        _report_result(config.get(case_name, "in"), config.get(case_name, "out-not"), test_out, boolean_func=_inversion)
 
 
 def _main():
diff --git a/test/e2e.ini b/test/e2e.ini
index 4b9883d..e27eafc 100644
--- a/test/e2e.ini
+++ b/test/e2e.ini
@@ -89,4 +89,4 @@ out: -----BEGIN PGP MESSAGE-----
 descr: Clear text message with inline PGP markers to recipient without a key.
 to: carlos@disposlab
 in: test/msgin/with-markers2clear.msg
-out: This message includes inline PGP markers.
+out-not: This message includes inline PGP markers.
diff --git a/test/e2e_test.py b/test/e2e_test.py
index 5a32053..7d0255d 100644
--- a/test/e2e_test.py
+++ b/test/e2e_test.py
@@ -81,10 +81,19 @@ def _load_file(name):
     return bytes(contents, 'utf-8')
 
 
-def _report_result(message_file, expected, test_output):
+def _identity(x):
+    return x
+
+
+def _inversion(x):
+    return not(x)
+
+
+def _report_result(message_file, expected, test_output, boolean_func=_identity):
     status = None
     expected_line = "\r\n" + expected  # + "\r\n"
-    if expected_line in test_output:
+    cond_met = boolean_func(expected_line in test_output)
+    if cond_met:
         status = "Success"
     else:
         status = "Failure"
@@ -132,7 +141,10 @@ def _execute_e2e_test(case_name, config, config_path):
 
     logging.debug(f"Read {len(testout)} characters of test output: '{testout}'")
 
-    _report_result(config.get(case_name, "in"), config.get(case_name, "out"), testout)
+    if 'out' in config[case_name]:
+        _report_result(config.get(case_name, "in"), config.get(case_name, "out"), testout)
+    else:
+        _report_result(config.get(case_name, "in"), config.get(case_name, "out-not"), testout, boolean_func=_inversion)
 
 
 def _load_test_config():