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Topic: SMTP


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In the News (Mon 17 Jun 19)

  
  RFC 2821 (rfc2821) - Simple Mail Transfer Protocol   (Site not responding. Last check: 2007-10-21)
SMTP clients that transfer all traffic, regardless of the target domain names associated with the individual messages, or that do not maintain queues for retrying message transmissions that initially cannot be completed, may otherwise conform to this specification but are not considered fully-capable.
SMTP server implementations that support the 251 and/or 551 reply codes are strongly encouraged to provide configuration mechanisms so that sites which conclude that they would undesirably disclose information can disable or restrict their use.
SMTP clients that experience a connection close, reset, or other communications failure due to circumstances not under their control (in violation of the intent of this specification but sometimes unavoidable) SHOULD, to maintain the robustness of the mail system, treat the mail transaction as if a 451 response had been received and act accordingly.
www.faqs.org /rfcs/rfc2821.html   (18604 words)

  
 Simple Mail Transfer Protocol - Wikipedia, the free encyclopedia
SMTP is a relatively simple, text-based protocol, where one or more recipients of a message are specified (and in most cases verified to exist) and then the message text is transferred.
SMTP is a "push" protocol that does not allow one to "pull" messages from a remote server on demand.
Modifying SMTP extensively, or replacing it completely, is not believed to be practical, due to the network effects of the huge installed base of SMTP.
en.wikipedia.org /wiki/SMTP   (1401 words)

  
 RFC 821 (rfc821) - Simple Mail Transfer Protocol   (Site not responding. Last check: 2007-10-21)
SMTP commands are generated by the sender-SMTP and sent to the receiver-SMTP.
SMTP replies are sent from the receiver-SMTP to the sender-SMTP in response to the commands.
SMTP REPLIES Replies to SMTP commands are devised to ensure the synchronization of requests and actions in the process of mail transfer, and to guarantee that the sender-SMTP always knows the state of the receiver-SMTP.
www.faqs.org /rfcs/rfc821.html   (10186 words)

  
 End of the road for SMTP? | CNET News.com
SMTP makes that assumption because it doesn't suspect that you're sending a Trojan horse virus, posing as a relative of a deposed African dictator to make fraudulent pleas for money, or hijacking somebody else's computer to send tens of millions of ads for herbal Viagra.
Sluizer co-authored the 1981 Mail Transport Protocol, SMTP's direct predecessor, while she was a technical staffer at the University of Southern California's Information Sciences Institute in Marina del Rey, Calif.--the birthplace of such fundamental Internet protocols as the Transmission Control Protocol/Internet Protocol (TCP/IP).
Some say rewriting SMTP from the ground up would be prohibitively difficult because of the protocol's global user base, which is estimated to be in the hundreds of millions.
news.com.com /2100-1038_3-5058610.html   (2241 words)

  
 SMTP AUTH in sendmail 8.10-8.13
You can require the use of SMTP AUTH for relaying by simply turning off other means of relaying for incoming mail, e.g., the access map or class R.
Requiring SMTP AUTH for all mails is in general a bad idea, because then you cannot receive mails from other users (since the cannot authenticate).
The implementation of SMTP AUTH in sendmail 8.10 is based on a patch written by Tim Martin of CMU.
www.sendmail.org /%7Eca/email/auth.html   (1897 words)

  
 FEHCom - SMTP Authentication [Qmail Book]   (Site not responding. Last check: 2007-10-21)
SMTP Authentication is a scheme which was introduced in 1999 by J. Meyers of Netscape Communications and finally released as RFC 2554 ("SMTP Service Extension for Authentication").
SMTP Authentication is advertised by the SMTP Authentication server, requires a client to authenticate, while finally both parties have to mutually accept and support the chosen authentication procedure.
SMTP Authentication takes some ideas of the Simple Authentication and Security Layer (SASL) and does not fit well into the SMTP scheme, as will be outlined in this document.
www.fehcom.de /qmail/smtpauth.html   (4169 words)

  
 [No title]
Fully-capable SMTP implementations, including the relays used by these less capable Klensin Standards Track [Page 5] RFC 2821 Simple Mail Transfer Protocol April 2001 ones, and their destinations, are expected to support all of the queuing, retrying, and alternate address functions discussed in this specification.
If accepted, the SMTP server returns a 354 Intermediate reply and considers all succeeding lines up to but not including the end of mail data indicator to be the message text.
As discussed in section 2.4.1, a relay SMTP has no need to inspect or act upon the headers or body of the message data and MUST NOT do so except to add its own "Received:" header (section 4.4) and, optionally, to attempt to detect looping in the mail system (see section 6.2).
www.ietf.org /rfc/rfc2821.txt   (18420 words)

  
 RFC 2554 (rfc2554) - SMTP Service Extension for Authentication   (Site not responding. Last check: 2007-10-21)
Introduction This document defines an SMTP service extension [ESMTP] whereby an SMTP client may indicate an authentication mechanism to the server, perform an authentication protocol exchange, and optionally negotiate a security layer for subsequent protocol interactions.
Upon a security layer's taking effect, the SMTP protocol is reset to the initial state (the state in SMTP after a server issues a 220 service ready greeting).
The client MUST discard any knowledge obtained from the server, such as the list of SMTP service extensions, which was not obtained from the SASL negotiation itself (with the exception that a client MAY compare the list of advertised SASL mechanisms before and after authentication in order to detect an active down-negotiation attack).
www.faqs.org /rfcs/rfc2554.html   (2240 words)

  
 What is SMTP? - A Word Definition From the Webopedia Computer Dictionary   (Site not responding. Last check: 2007-10-21)
Most e-mail systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an e-mail client using either POP or IMAP.
In addition, SMTP is generally used to send messages from a mail client to a mail server.
This is why you need to specify both the POP or IMAP server and the SMTP server when you configure your e-mail application.
www.webopedia.com /TERM/S/SMTP.html   (366 words)

  
 SMTP Protocol Overview   (Site not responding. Last check: 2007-10-21)
Simple Mail Transfer Protocol (SMTP), documented in RFC 821, is Internet's standard host-to-host mail transport protocol and traditionally operates over TCP, port 25.
SMTP uses a style of asymmetric request-response protocol popular in the early 1980s, and still seen occasionally, most often in mail protocols.
The other possibility is to arrange for a periodic SMTP mail transfer from the exchange host to another, local SMTP exchange host which has been queuing all the outbound mail.
www.freesoft.org /CIE/Topics/94.htm   (372 words)

  
 RFC 1869 (rfc1869)
This memo defines a means whereby both an extended SMTP client and server may recognize each other as such and the server can inform the client as to the service extensions that it supports.
This indicates that both the server and client SMTP are in the initial state, that is, there is no transaction in progress and all state tables and buffers are cleared.
Klensin, et al Standards Track [Page 5] RFC 1869 SMTP Service Extensions November 1995 Additional verbs are bound by the same rules as EHLO keywords; specifically, verbs begining with "X" are local extensions that may not be registered or standardized and verbs not beginning with "X" must always be registered.
www.cse.ohio-state.edu /cgi-bin/rfc/rfc1869.html   (2404 words)

  
 Advanced SMTP Server - free download
Advanced SMTP Server is a system-tray local SMTP server program for Windows that lets you send email messages directly from your computer to recipient mailboxes.
Advanced SMTP Server supports all email programs like Outlook Express, Outlook, Eudora, etc. The email program you already use for sending and receiving messages can be connected to the server in a very easy way - just by using the word "localhost" instead of your current SMTP host.
Advanced SMTP Server is a system-tray local SMTP server program for Windows that lets you send email messages directly from your PC to recipient mailboxes ensuring your email privacy and security by means of bypassing your ISP's mail servers where your relevant information can be stored and viewed.
www.softstack.com /advsmtp.html   (497 words)

  
 QwikMail - qwik-smtpd - reliable SMTP server
The QwikMail SMTP server (qwik-smtpd) is intended to be a fast, secure, and efficient mail server (MTA).
In the meantime, qwik-smtpd is a playground for unique SMTP server implementations that support extensions and/or quirks not found in other production-quality servers.
The current code is believed to be stable and mature from an operational standpoint, despite the fact that it lacks ESMTP functionality.
qwikmail.sourceforge.net /smtpd   (422 words)

  
 Postfix SMTP AUTH (and TLS) HOWTO
From the SMTP servers point of view you try to send from an untrusted network when you dial-up.
After messaging is done she removes the IP and restarts the SMTP server once more.
When they send messages after the pop/imap the SMTP server also looks up the file or database that the pop/imap server has written to and if the IP is found in there the client may relay messages.
postfix.state-of-mind.de /patrick.koetter/smtpauth   (634 words)

  
 SMTP Transport Binding for SOAP 1.1
SOAP [1] is a lightweight protocol for exchange of information in a decentralized, distributed environment, using XML.
The URI http://schemas.pocketsoap.com/soap/smtp SHOULD be used to identify SMTP transports compliant with this specification in the transport attribute of the soap:binding element of a WSDL [6] document (see section 3.3 of the WSDL spec.)
This SHOULD be achieved via the standard Message-Id and In-Reply-To SMTP headers [8].
www.pocketsoap.com /specs/smtpbinding   (490 words)

  
 Stopping spam with the Anti-Spam-SMTP-Proxy (ASSP)
The SMTP server is the only place where spam can be stopped before entering your system.
But when enough of the message had been transmitted to validate its legitimacy the ASSP server could either pipe the remainder of the message to the official SMTP server or close the connection to the official SMTP server and ignore the remainder of the message.
The Anti-Spam SMTP Proxy (ASSP) Server project is an open source platform-independent SMTP Proxy server which implements whitelists and Bayesian filtering to rid the planet of the blight of unsolicited email (UCE).
assp.sourceforge.net   (633 words)

  
 Free SMTP Server
Free SMTP Server is a SMTP server program for Windows that lets you send email messages directly from your computer.
Free SMTP Server supports all email programs like Outlook Express and Eudora, but best optimized to work with Outlook Express.
Free SMTP Server is very fast, while sending, it establishes dozens of SMTP connections, and gets the most out of your Internet connection.
www.softstack.com /freesmtp.html   (256 words)

  
 SMTP mail relay server - authenticated SMTP service, mobile / relaying denied and SMTP errors solved.
SMTP mail relay server - authenticated SMTP service, mobile / relaying denied and SMTP errors solved.
Ability to send a large number of emails in a short period of time.
AuthSMTP is a SMTP mail relay service that solves all these problems and provides many advanced features for a very low cost meaning you can send
www.authsmtp.com   (194 words)

  
 Easy SMTP Server - secure and reliable way to send e-mail from your portable PC
Easy SMTP Server is a simple easy-to-use program working in background that lets you send e-mail messages directly from your PC bypassing ISP's SMTP servers.
Using this program instead of your ISP's SMTP server you will increase your e-mail security and privacy as well as get rid of annoying change of settings for your e-mail program.
Easy SMTP Server is supported by all email programs including Outlook Express and Eudora.
www.softfolder.com /easy_smtp_server.html   (239 words)

  
 test.smtp.org   (Site not responding. Last check: 2007-10-21)
An SMTP interoperability machine has been setup for testing with the open source version of sendmail 8.13.
Do not use this machine to monitor your SMTP connectivity.
If you wish to test SMTP authentication, 20 accounts have been created for testers to use.
test.smtp.org   (178 words)

  
 Best FREE POP3 and SMTP Email providers
All listed free email providers offer as a minimum free POP3 and SMTP services which means you can receive and send email with your favorite email software (like Microsoft Outlook Express, Eudora, Netscape Email and many others).
Yahoo removed its SMTP service in the past but now added it again.
Here are instruction on how to setup Yahoo SMTP with various email client.
www.iopus.com /guides/bestpopsmtp.htm   (652 words)

  
 OpenBSD Sendmail + SMTP AUTH Mini-HOWTO   (Site not responding. Last check: 2007-10-21)
It covers recompiling OpenBSD's sendmail sources with support for SASL [RFC 2222], which SMTP AUTH is based on.
In order to have your new sendmail binary actually be able to support SMTP AUTH via these sasl libraries, you need to delete all the symlinks in this directory and re-create them such that they actually point to the real library files.
At this point, your sendmail binary and the SASL libraries it is dependant on for SMPT AUTH support are all ready to rock.
www.gnutec.com /~amonk/writing/technical/howtos/obsd-sendmail+sasl.html   (884 words)

  
 NetBenefit - e-mail
This is normally due to a firewall, or MS proxy server blocking port 25 requests.
This is assuming you're using a dial-up modem to access the SMTP server, if not then go to Step 2.
With SMTP mail, the default is for a server to use DNS for delivery.
www.netbenefit.com /storeandforward.html   (2086 words)

  
 AY SMTP Diagnostic Tool   (Site not responding. Last check: 2007-10-21)
If you do not know your SMTP server, the tool will do its best to find it for you.
If you have AY Mail 2 you can use the diagnostic tool to automatically tune AY Mail settings according to the test results.
Download AY SMTP Diagnostic tool now (Only 114K).
www.aysoft.com /aydiag.htm   (137 words)

  
 Definition of Simple Mail Transfer Protocol
Although optional, nearly all clients ask the server which SMTP extensions the server supports by using the EHLO greeting (rather than HELO as shown above) and the text body of the email (following DATA) is typically MIME formatted.
The Anti-Spam Research Group of the IRTF is working on a number of proposals for providing simple source authentication that is flexible, lightweight, and scalable.
The list of authors can be found here.
www.wordiq.com /definition/Simple_Mail_Transfer_Protocol   (733 words)

  
 Free SMTP Server - QK SMTP Server
QK SMTP Server is a powerful but extremely easy-to-use smtp server software, which can send mails from local host to the recipients' mailboxes directly at an amazingly high speed.
When the senders know that it is impossible for the recipients to receive the mails via "directly sending" mode, he can set the retry attempts to 0, i.e.: choose the "Delivery via relay smtp server" mode.
QK SMTP Server allows you to view and manage email delivery and receiving status.
www.qksoft.com /qk-smtp-server   (499 words)

  
 [No title]
Postel [Page 5] August 1982 RFC 821 Simple Mail Transfer Protocol ------------------------------------------------------------- Example of the SMTP Procedure This SMTP example shows mail sent by Smith at host Alpha.ARPA, to Jones, Green, and Brown at host Beta.ARPA.
Postel [Page 29] August 1982 RFC 821 Simple Mail Transfer Protocol The syntax of the above argument fields (using BNF notation where applicable) is given below.
The sender should [Page 48] Postel RFC 821 August 1982 Simple Mail Transfer Protocol return to the beginning of the command sequence (if any).
www.ietf.org /rfc/rfc0821.txt   (11071 words)

  
 SMTP Proxy Homepage   (Site not responding. Last check: 2007-10-21)
SMTP proxy is server, which allows sending mail by SMTP, if you do not have a direct access to real SMTP server.
Its configuration is much easier than normal SMTP relay server.
This program comes in two versions (C and Java).
home.tiscali.cz:8080 /~cz210552/smtpproxy.html   (50 words)

  
 Sender Policy Framework
Domain owners identify sending mail servers in DNS.
SMTP receivers verify the envelope sender address against this information, and can distinguish authentic messages from forgeries before any message data is transmitted.
SPF is ushering in a new set of anti-spam systems, where email is spam unless proven otherwise.
spf.pobox.com   (99 words)

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