It sounds like the DOD already does block emails to .ml because of this issue:
> Lt. Cmdr Tim Gorman [...] said that emails sent directly from the .mil domain to Malian addresses “are blocked before they leave the .mil domain and the sender is notified that they must validate the email addresses of the intended recipients”.
I think the issue is people sending emails from personal accounts that the DOD cannot control. The article also mentions travel agents as another source of the email.
Sales and travel agents, an IT depts worse nightmare. People too busy to double check anything are the fault of emails delivering to the wrong recipient.
> Lt. Cmdr Tim Gorman [...] said that emails sent directly from the .mil domain to Malian addresses “are blocked before they leave the .mil domain and the sender is notified that they must validate the email addresses of the intended recipients”.
I think the issue is people sending emails from personal accounts that the DOD cannot control. The article also mentions travel agents as another source of the email.