When you receive an email containing pictures from a new domain in Outlook you can right-click on the address and "Mark this domain as trusted" which will autoload all the photos on future emails.
But the "from" field in an email is spoofable by anyone with a passing knowledge of programming. So my question is does Outlook actually scrutinize the headers and the email's origins? Or is it just setting a text filter for future "from" fields?
Under the latter case if I marked example.com as trusted then any future spam falsely claiming to be from example.com would screw me.