SMTP was published as RFC 788 in November 1981, also by Postel.

The SMTP standard was developed around the same time as Usenet, a one-to-many communication network with some similarities.

* Courier Mail Server SMTP and IMAP server, for which the Maildir ++ format was invented

* Qmail SMTP server, for which Maildir format was invented

After the Accurev acquisition, the EMUmail webmail line was killed in favor of the SMTP. com email delivery service which is still sold today.

The new protocol for sending mail was SMTP, and after DNS replaced hosts files, delivermail evolved into sendmail, which is still the most widely used MTA on UNIX systems today.

It resembled the Simple Mail Transfer Protocol ( SMTP ), but was tailored for exchanging newsgroup articles.

This was widely used for several years, but was superseded by the generally more convenient SMTP form.

A mail server can try to verify the sender address by making an SMTP connection back to the mail exchanger for the address, as if it was creating a bounce, but stopping just before any email is sent.

Its first service was the " standard dial-up " ( SDU )-full TCP / IP access on a static IP address allowing users to receive SMTP mail and other IP traffic direct to their computers.

450 = 2 × 3 < sup > 2 </ sup > × 5 < sup > 2 </ sup >, nontotient, sum of totient function for first 38 integers, refactorable number, Harshad number, also SMTP code meaning the requested mail action was not carried out, a perfect score in Canadian five-pin bowling and an area code in Southern Quebec.

Susimail was created to address privacy concerns in using these servers directly using traditional email clients, such as leaking the user's hostname while communicating with the SMTP server.

An " Option Pack " was available as a free-bundled CD starting around 1998, which included IIS 4. 0 with Active Server Pages, FrontPage Server Extensions, Certificate Server, MTS, MSMQ, CDONTS, Internet Authentication Service ( IAS ), Indexing Service, Microsoft Management Console 1. 0, Microsoft Site Server, SMTP and NNTP services and other new software.

Originally Internet SMTP email was 7-bit ASCII text only, and attaching files was done by manually encoding 8-bit files using uuencode, BinHex or xxencode and pasting the resulting text into the body of the message.

Today these paths are normally reduced to ordinary e-mail addresses, as the old SMTP ' source routing ' was deprecated in 1989 ; for some historical background info see Sender Rewriting Scheme.

The system was designed in an era when there were many e-mail formats and services, including online services such as CompuServe and AppleLink, networking standards like X. 400 and SMTP ( internet mail ) and LAN-based servers such as Microsoft Mail and QuickMail.

The format of additional SMTP verbs was set and for new parameters in MAIL and RCPT.

BEEP was designed by Marshall Rose, who also worked on the POP3, SMTP, and SNMP protocols.

It was originally designed to be a drop-in replacement for qmail-smtpd, the SMTP component of qmail, and it is now also compatible with Postfix, Exim, sendmail and virtually any software that " speaks SMTP ".

The Science and Math Talent Program ( SMTP ) was introduced in 2009, for students who are gifted in Sciences and Mathematics.

** developed the first SMTP email server,

503 prime number, safe prime, sum of three consecutive primes ( 163 + 167 + 173 ), sum of the cubes of the first four primes, Chen prime, Eisenstein prime with no imaginary part, also a proposed HTTP status code indicating a gateway time-out, SMTP status code meaning bad sequence of commands

For example, an address record, having mnemonic A for IPv4 and AAAA for IPv6, maps the domain name in the first field to an IP address in the fourth field, and a mail exchanger record ( type MX ) specifies the Simple Mail Transfer Protocol ( SMTP ) mail host for a domain.

There is no encoding defined which is explicitly designed for sending arbitrary binary data through SMTP transports with the 8BITMIME extension.

In January 1986, RFC 973 and RFC 974 deprecated the MD and MF records, replaced them with MX, and defined the MX lookup with fallback to A. RFC 974 recommends that clients do a WKS lookup on each MX host to see if it actually supports SMTP and discard the MX entry if it doesn't.

The transmission of email over the Internet normally uses the Simple Mail Transfer Protocol ( SMTP ), defined in Internet standards RFC 5321 and RFC 5322, and extensions like RFC 6531.

Mapping messages into and out of MIME format is typically done automatically by an email client or by mail servers when sending or receiving Internet ( SMTP / MIME ) email.

The transmission details are specified by the Simple Mail Transfer Protocol ( SMTP ).

The process of choosing a target MTA for the next hop is also described in SMTP, but can usually be overridden by configuring the MTA software with specific routes.

SMTP connections secured by SSL are known by the shorthand SMTPS, though SMTPS is not a protocol in its own right.

In particular, a properly secured SMTP mail relay should not accept and forward arbitrary e-mails from non-local IP addresses to non-local mailboxes by an unauthenticated or unauthorized user.

This technique mainly addresses routing problems ; other types of server load can be addressed by using an SMTP proxy.

* By comparing the sequence of network hops reported by a tool such as traceroute for a proxied protocol such as http ( port 80 ) with that for a non proxied protocol such as SMTP ( port 25 ).

The task is typically accomplished by implementing Simple Mail Transfer Protocol ( SMTP ) and possibly providing access to messages through Internet Message Access Protocol ( IMAP ), the Post Office Protocol, Webmail, or a proprietary protocol ..

The UUCP protocol has now mostly been replaced by the Internet TCP / IP based protocols SMTP for mail and NNTP Usenet news.

FTP, SMTP, HTTP and the usual web languages such as PHP and Perl are supported by PWS.

Increasingly, the Simple Mail Transfer Protocol ( SMTP ) is also protected by TLS.

For instance, qmail's approach to bounce messages ( a format called QSBMF ) differs from the standard format of delivery status notifications specified by the IETF in RFC 1894, meanwhile advanced to draft standard as RFC 3464, and recommended in the SMTP specification.

The addresses found in the header fields of an email message are not the ones used by SMTP servers to deliver the message.

E-mail messaging from phones, as popularized by NTT Docomo's i-mode and the RIM BlackBerry, also typically use standard mail protocols such as SMTP over TCP / IP.

When this is started they will replicate by using their own SMTP agent engine.

A greeting delay is a deliberate pause introduced by an SMTP server before it sends the SMTP greeting banner to the client.