Within Teamwork Desk, you can choose to hide customer images from tickets they submit to your inboxes.
The setting to trust customer images is enabled by default. If you decide to disable this feature, any images within tickets will be hidden.
To prevent images displaying in tickets received from customers, click your profile icon in the top right of your site and select Settings from the dropdown menu.
In the Settings area, go to the General tab and select Site Settings from the left sidebar.
Under message settings, toggle off the Trust customer images setting. Once disabled, images from untrusted customers will be hidden.
Messages with hidden images will be shown as below, giving you an option to show them.
Clicking Show images from this customer will immediately load the images within the ticket reply. Additionally, all future images from this customer will be loaded without prompting.
For more information, see: Managing Site Settings