Test Post For push from Directus

In 1980, Postel and Suzanne Sluizer published RFC 772 which proposed the Mail Transfer Protocol as a replacement for the use of the FTP for mail. RFC 780 of May 1981 removed all references to FTP and allocated port 57 for TCP and UDP,[15] an allocation that has since been removed by IANA. In November 1981, Postel published RFC 788 "Simple Mail Transfer Protocol". The SMTP standard was developed around the same time as Usenet, a one-to-many communication network with some similarities.[15] SMTP became widely used in the early 1980s. At the time, it was a complement to the Unix to Unix Copy Program (UUCP), which was better suited for handling email transfers between machines that were intermittently connected. SMTP, on the other hand, works best when both the sending and receiving machines are connected to the network all the time. Both used a store and forward mechanism and are examples of push technology. Though Usenet's newsgroups were still propagated with UUCP between servers,[16] UUCP as a mail transport has virtually disappeared[17] along with the "bang paths" it used as message routing headers.[18] Sendmail, released with 4.1cBSD in 1983, was one of the first mail transfer agents (MTA) to implement SMTP.[19] Over time, as BSD Unix became the most popular operating system on the Internet, Sendmail became the most common mail transfer agent.[20] The original SMTP protocol supported only unauthenticated unencrypted 7-bit ASCII text communications, susceptible to trivial man-in-the-middle attack, spoofing, and spamming, and requiring any binary data to be encoded to readable text before transmission. Due to absence of a proper authentication mechanism, by design every SMTP server was an open mail relay. The Internet Mail Consortium (IMC) reported that 55% of mail servers were open relays in 1998,[21] but less than 1% in 2002.[22] Because of spam concerns most email providers blocklist open relays,[23] making original SMTP essentially impractical for general use on the Internet.