[Allnick]

I believe there is an option here..........

ACP > vBulletin Options > User infraction & post reporting options > Post Reporting Discussion Forum.

Create a Forum that only Admin has access to.
Select this forum for this option.
When a member uses the "report post" function, a thread is automatically created in this forum...with the reported message.

Select "No Email" for the "Post Reporting Email" option.

It doesn't exactly do what you want...i.e send you an email. But it does ensure that the reported message is only viewed by Admin.