Twilio SMS and MMS messages, including message bodies and records, are kept in Twilio's cloud storage until a customer requests them be removed. Customers can request messages to be deleted at any time via an HTTP DELETE request.
Once an HTTP DELETE request is received, the corresponding message is removed from the customer facing repository that holds messages. Deleted messages can not be recovered. Message bodies may persist for up to 30 days after an HTTP DELETE request in our database backups.