I had recently shifted myself from Mozilla Thunderbird to MS Outlook 2010, while using it I had faced some problems and one of them was that if I got any mail and if mail contain any picture or any other attachment them Outlook wont show that picture, see screenshot below :-
I had to manually download it to see.Actually Outlook wont display those contents due to your security.
If you also facing same problem then here is the solution :-
Open you Oulook and click on File –> Options,
Now a window comes up, in it click on Trust center option in left sidebar and then click on Trust Center Setting,
Here another window comes just uncheck option saying, Don’t Download Picture Automatically in HTML e-mail message or RSS items,