Simple Mail Transfer Protocol' ('SMTP') is an electronic correspondence (e-mail) conveyance athwart Internet Protocol (IP) networks. SMTP was first described by RFC 821 (1982, finally proclaimed STD 10),RFC 821, Simple Mail Transfer Protocol, J.B. Postel, The Internet Society (August 1982) and final upgraded by RFC 5321 (2008) RFC 5321, Simple Mail Transfer Protocol, that contains the Extended SMTP (ESMTP) inclusions, and is the procedure in general employ this day. It is an Application Layer procedure in the OSI mention type.There has never been a SMTP Guide like this. It contains 53 answers, much more than you can imagine; comprehensive answers and extensive details and references, with insights that have never before been offered in print. Get the information you need--fast! This all-embracing guide offers a thorough view of key knowledge and detailed insight. This Guide introduces what you want to know about SMTP. A quick look inside of some of the subjects covered: 8-bit-clean - SMTP and NNTP 8-bit cleanness, Simple Mail Transfer Protocol - Outgoing mail SMTP server, SMTP - On-Demand Mail Relay, Client SMTP Authorization - Principles of Operation, SMTP Authentication - Details, SMTP - History, OpenSMTPD, Extended SMTP - List of supporting servers, Antispam - SMTP proxy, Extended SMTP - Extensions, Simple Mail Transfer Protocol - SMTP transport example, SMTP - Restricting access by location, Extended SMTP - SMTP-AUTH, Anti-Spam SMTP Proxy - Disadvantages, SMTP (company), Extended SMTP - SMTPUTF8, List of mail servers - Simple Mail Transfer Protocol|SMTP, SMTP - Open relay, SMTP Authentication - History, Simple Mail Transfer Protocol - SMTP vs mail retrieval, Extended SMTP - List of supporting local servers, SMTP Authentication - Standards, SMTP - Security and spamming, SMTP Authentication - Role in the mail transport system, OpenSMTPD - History, SMTP (company) - Services, SMTP - Internationalization, SMTP after POP, and much more...