3 million mail servers without encryption
Well, that's no small number
Quote
"As scans from the ShadowServer security threat monitoring platform Shadowserver show, around 3.3 million hosts are running POP3/IMAP services without TLS encryption enabled and expose usernames and passwords in plain text when transmitted over the Internet."
Over 3 million mail servers without encryption exposed to sniffing attacks
Over three million POP3 and IMAP mail servers without TLS encryption are currently exposed on the Internet and vulnerable to network sniffing attacks.
Sergiu Gatlan
Not ideal at all. When is the last time you checked yours.