By default, Postbox blocks the loading of remote images when reading mail messages.
Spammers can name images with a unique identifier, and when the image is loaded, it can confirm to the spammer that your email address is valid.
Postbox always recommends that you block the remote loading of images unless the images are from a trusted or reputable source.
Loading Remote Images
To load remote images for a particular message, click the "Load Images" link within the notification bar.
To always load remote images from a particular sender or domain, click the arrow to the right of "Load Images", then select either the email address or domain.
Disabling for All Messages
To disable this feature and to load remote images for all mail messages:
- Open Preferences (on the Mac) or Tools | Options (on Windows)
- Click on Privacy
- Select the checkbox for "Allow remote content in messages"
Resetting Remote Content Preferences
If you wish to reset your remote content preferences for email addresses, for example, if you allowed images to come in on a particular email address when you didn't mean to, then this can be accomplished in Preferences | Options > Privacy > Exceptions.