diff --git a/anymail/signals.py b/anymail/signals.py
index 533e5b0..4344606 100644
--- a/anymail/signals.py
+++ b/anymail/signals.py
@@ -46,17 +46,6 @@ class AnymailInboundEvent(AnymailEvent):
     def __init__(self, **kwargs):
         super(AnymailInboundEvent, self).__init__(**kwargs)
         self.message = kwargs.pop('message', None)  # anymail.inbound.AnymailInboundMessage
-        self.recipient = kwargs.pop('recipient', None)  # str: envelope recipient
-        self.sender = kwargs.pop('sender', None)  # str: envelope sender
-
-        self.stripped_text = kwargs.pop('stripped_text', None)  # cleaned of quotes/signatures (varies by ESP)
-        self.stripped_html = kwargs.pop('stripped_html', None)
-        self.spam_detected = kwargs.pop('spam_detected', None)  # bool
-        self.spam_score = kwargs.pop('spam_score', None)  # float: usually SpamAssassin
-
-        # SPF status?
-        # DKIM status?
-        # DMARC status? (no ESP has documented support yet)
 
 
 class EventType: