In the episode Email Surveillance, Michael is given the ability to monitor e-mails. We can clearly see
Reply to All
Foward and the
X for delete.
He's monitoring Stanley's inbox when these options become available.
In the episode Back From Vacation, Michael accidentally sends a photo to packaging instead of Packer:
Michael: OK, wait a second. I sent it to you at… [reading computer screen] firstname.lastname@example.org. email@example.com. Uh oh.
Couldn't he open the email surveillance program, access
firstname.lastname@example.org, and delete the photo?
This won't stop distribution of the photo if Darryl had downloaded the photo locally (to his
Downloads folder), but he can just get Dwight to confiscate the laptop.