1- first add the domain to your Cloudflare account and activate it.
2- click on your domain name > email > Enable Email Routing
3- Click on “add record and enable”.
4- Come to “Routing Rules” and click on “Create address”
5- Give “username” for an email address, Action = “send to and email”, Destination = “Email address” where you want to get emails.
6- Cloudflare sends you a verification email on your “Destination Email Address” Open your email and click on the “Verify email address” button
7- now send a test email, and check magic.