diff --git a/www/common/outer/mailbox.js b/www/common/outer/mailbox.js
index 081f64cc3..c70243d9f 100644
--- a/www/common/outer/mailbox.js
+++ b/www/common/outer/mailbox.js
@@ -85,6 +85,9 @@ proxy.mailboxes = {
         if (!keys) { return void cb({error: "missing asymmetric encryption keys"}); }
         if (!user || !user.channel || !user.curvePublic) { return void cb({error: "no notification channel"}); }
 
+        var anonRpc = Util.find(ctx, [ 'store', 'anon_rpc', ]);
+        if (!anonRpc) { return void cb({error: "anonymous rpc session not ready"}); }
+
         var crypto = Crypto.Mailbox.createEncryptor(keys);
         var network = ctx.store.network;
 
@@ -94,29 +97,16 @@ proxy.mailboxes = {
         });
         var ciphertext = crypto.encrypt(text, user.curvePublic);
 
-        network.join(user.channel).then(function (wc) {
-            wc.bcast(ciphertext).then(function () {
-                cb();
-
-                // If we've just sent a message to one of our mailboxes, we have to trigger the handler manually
-                // (the server won't send back our message to us)
-                // If it isn't one of our mailboxes, we can close it now
-                var box;
-                if (Object.keys(ctx.boxes).some(function (t) {
-                    var _box = ctx.boxes[t];
-                    if (_box.channel === user.channel) {
-                        box = _box;
-                        return true;
-                    }
-                })) {
-                    var hash = ciphertext.slice(0, 64);
-                    box.onMessage(text, null, null, null, hash, user.curvePublic);
-                } else {
-                    wc.leave();
-                }
-            });
-        }, function (err) {
-            cb({error: err});
+        anonRpc.send("WRITE_PRIVATE_MESSAGE", [
+            user.channel,
+            ciphertext
+        ], function (err, response) {
+            if (err) {
+                return void cb({
+                    error: err,
+                });
+            }
+            return void cb();
         });
     };