I have some VB6 programs which uses MAPI to send email messages and after updating to Windows XP + Outlook 2002 they stopped working due to Microsoft Outlook security prompt. As I found no way to curstomize (say which programs can and cannot send mail) or even turn it off, I just downloaded Express ClickYes - auto-click the Outlook security prompt and installed it.
If you, like me, do not afford paying an employee to stay 24 hours a day, seven days a week in front a computer, just clicking the "Yes" button, then give Express ClickYes - auto-click the Outlook security prompt a try.
In questo caso mi sembra che la cura è davvero peggio
del male!!! 
Source: Express ClickYes - auto-click the Outlook security prompt