Note: If you are using the Gmail mobile app, the steps are identical. Open the email, tap the three dots next to the sender's name, and select "Block [Sender]."
When you block a contact, the experience is discreet. The sender that they have been blocked. They can still send you emails, and their mail server will show the message as "sent" successfully. However, on your end: blocked contacts gmail
The process is designed to be seamless, allowing you to act the moment you open an unwelcome message. Note: If you are using the Gmail mobile