There are lots of ways For example, there are different companies such as https://www.massmailsoftware.com/bulksmsandpager/bulk-sms-software/sms free software, I personally have been using it for 2 years already. In general, there are many different ways and companies to duplicate a marketing email, depending on what you need it for. Good luck resolving your situations!

Hi,

1. Go to Email marketing-> Open the record you want to duplicate

2. Action Menu-> Duplicate 

Hope it helps,