@Sulaima
When you login to your online Sky email account here you will see the option to turn this on:
https://skyid.sky.com/signin/email/
If you don't have a Sky email address and you are asking how to turn this on for your Sky account then you can't as there is no such option.
__________________________________________________________________________________________
If someone has helped you then please click on the LIKES button in their post.
If you need help please provide as much information as you can
