In SMTP, append envelope details to each message. Fixes #20.

Author: jaraco

pytest_localserver/smtp.py

@@ -48,9 +48,17 @@ def process_message(self, peer, mailfrom, rcpttos, data, **kwargs):
         Adds message to outbox.
         """
         try:
-            self.outbox += [email.message_from_bytes(data)]
+            message = email.message_from_bytes(data)
         except AttributeError:
-            self.outbox += [email.message_from_string(data)]
+            message = email.message_from_string(data)
+        # on the message, also set the envelope details
+        message.details = dict(
+            peer=peer,
+            mailfrom=mailfrom,
+            rcpttos=rcpttos,
+            **kwargs
+        )
+        self.outbox.append(message)
 
     def run(self):
         """