The US military uses .mil as their top-level domain name. But when you mistype that as .ml, e-mails with personal information can end up in Mali.
Taken from someone who owns a lot of domain names and have frequently received email meant for others, it never ceases to amaze me how much sensitive info is sent across this open protocol.
https://edition.cnn.com/2023/07/17/politics/email-typos-mali-military-emails/index.html