He probado lo de redireccionar a una página de gracias y a otra de error, cuando se envia correctamente me sale la página de gracias, pero cuando no se envía no me sale la de error, me sale:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator,
[email protected] and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.