Post Office Protocol 3, or POP3 as it is more commonly known as, it the protocol used by most Internet Service Provider mail servicers for the retrieval and download of Internet email to a local ...
It's a lot more flexible than POP (Post Office Protocol), which essentially ties you to a single device. You need to choose the email protocol — IMAP or POP — when you initially set up the ...
Around 3.3 million servers are running POP3/IMAP email services without encryption (TLS) enabled, the Shadowserver Foundation, a nonprofit security organization, has discovered.