Downloading pictures for selected contacts

Pictures in messages from some senders are not downloaded unless I click a bar above the message. Pictures in messages from others download as soon as the message is opened.
Have I created some kind of list that allows this to occur? If so, how can I edit the list?

Outlook 2003 and Outlook 2007 will by default block images from being automatically downloaded from the Internet but they will automatically download for addresses that you have specified in the Safe Senders and Safe Recipients Lists of the Junk E-mail filter.
To edit this list, go to Tools-> Options-> Junk Email…-> tab Safe Senders and tab Safe Recipients

If you don’t like this behavior and you want to always block pictures from being automatically downloaded from the Internet, then you can change this behavior in;

Outlook 2007
Tools-> Trust Center…-> section: Automatic Download-> disable option: Permit downloads in e-mail messages from sender and to recipients defined in the Safe Senders and Safe Recipients Lists used by the Junk E-mail filter.

Outlook 2003
Tools-> Options-> tab Security-> button: Change Automatic Download Settings…-> disable option: Permit downloads in e-mail messages from sender and to recipients defined in the Safe Senders and Safe Recipients Lists used by the Junk E-mail filter.

Note: You might indeed want to disable this option when a spammer is abusing the address of a contact you have defined in your Safe Senders list. This way, no tracking image is downloaded then and your address won’t be exposed.