Spammers can sometimes use images to get you to visit their website. This problem can be solved by blocking external images from loading and therefore prevent becoming a victim to a scam.
1: Open the Gmail app and open the side menu
2: Scroll down the side menu
3: Click on Settings to open the settings menu
4: Click on the account you want to apply this to
5: Click on Images
6: Click “Ask before displaying external images”