How to Block Someone on Gmail on iPhone? The procedure to how to block someone on Gmail app in iOS is quite simple. First, open the Gmail app on your iPhone. Then, open the email (message) of the person that you want to block in Gmail. Now, click on the 'More' option, which is shown as three dots on the right top corner. Now click on the 'Block Sender Name' option from the drop-down. That's it. The contact is now blocked. Visit for more detail https://contactforservice.com/how-to-block-someone-on-gmail-and-unblock/