If you need help on Symfony2, consider subscribing to the Symfony2 user mailing-list:
Legacy mailing lists
These mailing lists are no longer active, but they are still maintained for reference purposes.
If you need help on symfony1, consider subscribing to the symfony1 user mailing-list:
You can also browse the archive of the old Users Group.
The developer mailing list is closed as of December 2013. Nevertheless, you can still browse its archive. If you want to contribute to the project or want to discuss a new feature, please refer to the Symfony GitHub repository.