diff --git a/Mailbox-Architecture.md b/Mailbox-Architecture.md
index e8eca62..9ab7c45 100644
--- a/Mailbox-Architecture.md
+++ b/Mailbox-Architecture.md
@@ -39,3 +39,8 @@
 * HTTPS with self-signed cert for communicating over LAN
 * Owner and contacts need to know mailbox's cert fingerprint
 * Owner and contacts need to be able to check fingerprint of received cert
+
+### RSS
+
+* On Android, mailbox can receive RSS feeds shared by other apps in the form of XML files
+* Mailbox stores these files for collection by owner