If you use the Samsung Galaxy S7 e-mail app, you may not be able to see pictures within the e-mail. This is caused by a special setting that reads: "View Images" Most likely this option was disabled on your Samsung Galaxy S7.
We now explain to you how to reactivate the Option "Show Pictures". To do this, follow these steps on your Samsung Galaxy S7:
1. Open the e-mail app on your Samsung Galaxy S7
2. In the upper right corner, touch "More" and then "Settings".
3. Now select your E Mail account, and then you will see "View Images"
4. Activate the slider here to reactivate this setting. Afterwards, you will see all images in your e-mails.
You now know the reason why no pictures are suddenly displayed in e-mails on your Samsung Galaxy S7.