How to Block a Sender On Gmail
Here is the easiest way to block a sender if you’re using Gmail.
2. Click the More menu button (the three vertical dots icon) next to the Reply button near the top of the message.
And that’s how you block a sender in Gmail. From now on, all messages from the sender you blocked will be sent directly to the Gmail spam folder. This should prevent you from getting any more email from that sender in your Gmail Inbox.
And should you ever want to unblock a sender do this: