Experts warn that millions of email servers could be vulnerable to attacks


  • New research shows that millions of host sites lack TLS encryption
  • TLS encryption enables end-to-end encryption for more secure communications and browsing
  • ShadowServer has recommended decommissioning these hosts

New research from ShadowServer has found that 3.3 million POP3 (Post Office Protocol) and IMAP (Internet Message Access Protocol) mail servers are currently exposed to network sniffing attacks because they lack TLS encryption.

TLS, or Transport Layer Security, is a security protocol that provides end-to-end security between applications over the Internet. It is used for secure Internet browsing and encrypts email communications, file transfers, and messaging.