diff --git a/mail_decode_address/models/mail_thread.py b/mail_decode_address/models/mail_thread.py
index 94220d4..99675b7 100644
--- a/mail_decode_address/models/mail_thread.py
+++ b/mail_decode_address/models/mail_thread.py
@@ -8,6 +8,12 @@ class MailThread(models.AbstractModel):
 
     _inherit = 'mail.thread'
 
+    @api.model
+    def create(self, vals):
+        if vals.get("email_from"):
+            vals["email_from"] = tools.decode_smtp_header(vals["email_from"])
+        return super(MailThread, self).create(vals)
+
     def _message_post_after_hook(self, message, msg_vals):
         if message.email_from:
             message.email_from = tools.decode_smtp_header(message.email_from)