[I've actually sent this via fax and email to Google, Microsoft, and Yahoo, no reply yet]
As you know, many 419 (advance fee fraud) scammers use your service to communicate with potential victims.
In other words, scammers use both your email addresses to receive
replies, and your SMTP servers to send email.
I know that you shut down these addresses when they’re reported, and
was wondering if you could take one additional step.
After these account are closed, could you go through the scammer’s
“sent mail” and inform all potential victims about 419 scams?
explicitly deals with criminal activity.