Reply to sender

mail_reply_to_sender/models/__init__.py

@@ -0,0 +1,2 @@
+# -*- coding: utf-8 -*-
+from . import ir_mail_server

mail_reply_to_sender/models/ir_mail_server.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+from odoo import models,api
+
+class MailComposer(models.TransientModel):
+    _inherit = 'mail.compose.message'
+
+    @api.multi
+    def get_mail_values(self, res_ids):
+        res = super(MailComposer, self).get_mail_values(res_ids)
+        if self.composition_mode == 'comment':
+            mail_reply_to = getattr(self, 'reply_to', None)
+            if mail_reply_to:
+                for f, x in res.items():
+                    if 'reply_to' not in x:
+                        x['reply_to'] = mail_reply_to
+        return res