diff --git a/screenless/bureau/mailroom/mailroom.py b/screenless/bureau/mailroom/mailroom.py
index fd6899e..0d07151 100644
--- a/screenless/bureau/mailroom/mailroom.py
+++ b/screenless/bureau/mailroom/mailroom.py
@@ -269,15 +269,15 @@ class MailRoom(Bureau):
 
         for msgid, data in resp.items():
             msg = {}
-            env = data["ENVELOPE"]
+            env = data[b"ENVELOPE"]
 
             msg["msgid"] = str(msgid)
             sender = env.from_[0]
-            msg["fromaddr"] = sender.mailbox + "@" + sender.host
-            msg["fromname"] = sender.name
-            msg["date"] = data["INTERNALDATE"]
-            msg["size"] = data["RFC822.SIZE"]
-            msg["subject"] = env.subject
+            msg["fromaddr"] = str(sender.mailbox) + "@" + str(sender.host)
+            msg["fromname"] = str(sender.name)
+            msg["date"] = str(data[b"INTERNALDATE"])
+            msg["size"] = str(data[b"RFC822.SIZE"])
+            msg["subject"] = str(env.subject)
 
             msgs.append(msg)