After logging into mail.twc.com, select: Settings > Forward Options. From there you can forward or forward a copy. I've also included a link to email support that you may find helpful. Please let us know if we can assist further.
Spectrum Social Media Customer Care
Forums Community Manager
Email is a free feature that is provided with the service. If service is discontinued, the email will be deactivated. You would want to save your contacts and notify them of any changes prior to ending service. Once the email is deactivated, anyone sending a message to the deactivated email will get a generic message that the email could not be delivered.