diff --git a/smtp.py.tmp b/smtp.py.tmp
new file mode 100644
index 0000000..6893d29
--- /dev/null
+++ b/smtp.py.tmp
@@ -0,0 +1,52 @@
+## todo
+
+def jsonrpc2_create_id(data):
+    return hashlib.sha1(json.dumps(data).encode(client_encoding)).hexdigest()
+
+def jsonrpc2_encode(method, params = None):
+    data = {
+        "jsonrpc": "2.0",
+        "method": method,
+        "params": params
+    }
+    id = jsonrpc2_create_id(data)
+    data['id'] = id
+    return (id, json.dumps(data))
+
+def jsonrpc2_decode(data):
+    type, id, method, rpcdata = (None, None, None, None)
+    typemap = {
+        "params": "call",
+        "error": "error",
+        "result": "result"
+    }
+
+    jsondata = json.loads(data)
+    if jsondata['jsonrpc'] == "2.0":
+        for k, v in typemap.items():
+            if k in jsondata:
+                type = v
+                rpcdata = jsondata[k]
+        id = jsondata['id']
+
+    if type == "call":
+        method = jsondata['method']
+
+    return type, id, method, rpcdata
+
+class CaterpillarSMTPServer(SMTPServer):
+    def process_message(self, peer, mailfrom, rcpttos, data, **kwargs):
+        message_lines = data.decode('utf-8').split('\n')
+        subject = ''
+        to = ''
+        for line in message_lines:
+            pos = line.find(':')
+            if pos > -1:
+                k = line[0:pos]
+                v = line[pos+1:]
+                if k = 'Subject':
+                    subject = v
+                elif k = 'To':
+                    subject = v
+
+## todo