recruitment/forms.py

@@ -1588,6 +1588,9 @@ class MessageForm(forms.ModelForm):
         # Validate messaging permissions
         if self.user and cleaned_data.get("recipient"):
             self._validate_messaging_permissions(cleaned_data)
+        
+        if self.cleaned_data.get('recipient')==self.user:
+            raise forms.ValidationError(_("You cannot message yourself"))
 
         return cleaned_data