add backend to the newsletter 

![image](https://github.com/user-attachments/assets/edd108a0-3c8c-435d-9460-29e5fa88ef11)

i want to add backend tot he newsletter 

send email like this upon Subscription of newsletter
![Screenshot (119)](https://github.com/user-attachments/assets/5d1934dd-020c-4354-a774-77d4efb64081)

please assign this issue to me @Shreyaa173 