External images are not part of the email itself. They are loaded from an external source upon reading the email. You can define whether those images are loaded and displayed. If you allow loading externally linked images, your privacy and computer are endangered by the following security issues:
The sender can gather information, e.g. whether your email address is valid or when you retrieved the email. Such information can e.g. be used to purposefully send spam emails.
The externally linked graphic can be used to infect your computer with malware.
How to define the loading of externally linked images:
Click on in the right pane.
Define the behavior.
If externally linked images are to be loaded and displayed, enable .
If you always want to be asked whether externally linked images should be displayed, enable .
You can specify that externally linked images are always displayed if they come from specific senders. To do so, enter the email addresses of these senders in the input field below .
Related topics:
Parent topic: Security & Privacy