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Topic: SMTP Relay

	RFC 2821 (rfc2821) - Simple Mail Transfer Protocol (Site not responding. Last check: 2007-10-14)
		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)

	SMTP Mail Relay
		SMTP is a TCP/IP protocol governing electronic mail transmission and reception.
		Configuring the relay host for on-campus use is simple.
		SMTP is the Protocol for Sending Out Going mail regardless of the protocol you are using to read mail.
	telecom.njit.edu /docs/smtp_mail_relay.html (441 words)

	Postfix SMTP relay and access control
		The Postfix SMTP server receives mail from the network and is exposed to the big bad world of junk email and viruses.
		Protocol oriented: some SMTP server access controls block mail by being very strict with respect to the SMTP protocol; these catch poorly implemented and/or poorly configured junk email software, as well as email worms that come with their own non-standard SMTP client implementations.
		Blacklist oriented: some SMTP server access controls query fllists with known to be bad sites such as open mail relays, open web proxies, and home computers that have been compromised and that are under remote control by criminals.
	www.postfix.org /SMTPD_ACCESS_README.html (1615 words)

	SMTP.com - Your Offsite Email Relay Server> FAQ
		SMTP is the protocol (or standard) by which email is delivered on the internet.
		Your company or ISP may have an smtp server that knows who you are and authenticates your messages for security purposes.
		And for fear that you may be a spammer or some other unsecure delivery agent, that smtp server will not allow you to send email.
	www.smtp.com /faq.html (1102 words)

	The Firewall for Microsoft Exchange Server - Supporting ISA Server 2000 Publishing of Exchange Server 2000/2003 with ...
		SMTP relay issues are very common for Exchange Server administrators who need their mail servers to connect to the Internet.
		The SMTP server the SMTP relay computer forwards the message to may be the endpoint for the SMTP message, or it might be another SMTP relay.
		The SMTP relay is not the endpoint for this message, so it must relay the SMTP mail to the Exchange Server on the internal network.
	www.msexchange.org /articles/smtprelaypart1.html (2360 words)

	Mail relay testing (Site not responding. Last check: 2007-10-14)
		This can report false positives, hosts that appear to be open relays but actually aren't because they reject or discard a message after appearing to accept it.
		You must be a registered abuse.net user, and the relayed message will be addressed to you.
		To limit the likelihood of abuse, the relay tester limits the number of tests a single user can make to ten per hour.
	www.abuse.net /relay.html (269 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.
		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).
		Of course, since hosts are not required to relay mail at all, xyz.com may also reject the message entirely when the RCPT command is received, using a 550 code (since this is a "policy reason").
	www.ietf.org /rfc/rfc2821.txt (18420 words)

	Secure SMTP Server - SMTP mail relay server for your outgoing mail
		Secure SMTP server is a secure, reliable SMTP mail relay server for your outgoing mail.
		SMTP Server reporting system generates "Web Activity", "Mail Delivery", and "SMTP Traffic" reports for analysis and verification.
		SMTP Server Control Panel is a web-based application designed to provide full control over your account, system events, and mail delivery processes.
	www.smtp-server.com (263 words)

	RFC 821 (rfc821) - Simple Mail Transfer Protocol (Site not responding. Last check: 2007-10-14)
		SMTP replies are sent from the receiver-SMTP to the sender-SMTP in response to the commands.
		As each relay host adds itself to the beginning of the list, it must use its name as known in the IPCE to which it is relaying the mail rather than the IPCE from which the mail came (if they are different).
		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 (10257 words)

	Using Notes/Domino SMTP with a DMZ
		The SMTP servers should not be in the same domain as the internal servers; therefore, they cannot share a Notes Named Network, so mail routing connection documents are required.
		This relay address should relate to one or more MX records in the DNS to control priority over the routing path in scenarios where redundant paths are available.
		To do this, the Domino SMTP servers must have a directory against which they can compare addresses for validation to distinguish those that are legitimate and to reject others that are not.
	www.ibm.com /developerworks/lotus/library/smtp-dmz2 (3599 words)

	SpamHelp.org SMTP Open Relay Test
		This is a SMTP open relay test script which is able to report open relays to DSBL (Distributed Server Boycott List).
		An open relay (sometimes also referred to as a third-party relay) is a mail server that does not verify that it is authorised to send mail from the email address that a user is trying to send from.
		They use the open relays to send unsolicited mail to a large number of email addresses, which has an impact on delivery speed, bandwidth, disk storage space, CPU processing and more.
	www.spamhelp.org /shopenrelay (425 words)

	POP-before-SMTP Relay Configuration on FreeBSD Sendmail
		POP before SMTP relay is a method of allowing only certain mail users to relay e-mail through your sendmail server.
		In this document, relaying is the case where a remote user sends e-mail to your mail server, asking it to relay the e-mail to some other remote user.
		SMTP AUTH is considered by many to be far superior to POP before SMTP.
	www.technoids.org /freebsdpopb4smtp.html (979 words)

	SMTP AUTH relay attacks
		Spammers often use open relay mail servers to hide their identity.
		Once they successfully authenticate using the user credentials, they are granted to relay via the server, which is then used to send spam.
		This way the SMTP service will log a 1708 Information event which tells you which client computer authenticated, which login method they used, and which user account was used.
	www.vamsoft.com /orf/authattack.asp (609 words)

	FileForum \| Local SMTP Relay Server
		Local SMTP Relay Server is an SMTP server program for Windows that lets you send email messages directly from your computer.
		Along with a mass mailer, the program can be used as a relay server for sending newsletters, distributing messages to different mailing lists, sending notifications to your customers, as well as for sending personalized messages.
		Local SMTP Relay Server supports all email programs including Outlook Express and Eudora, but is optimized to work with Outlook Express.
	fileforum.betanews.com /detail/Local_SMTP_Relay_Server/1112786671/1 (103 words)

	Mail Relay Outbound service
		It provides a secure, authenticated outbound SMTP relay server, operating both on standard and non-standard ports (25, 26 and 940).
		One "relay" is counted for each recipient of a message you send.
		That is, one message, sent to 50 recipients, counts as 50 "relays." 50 different messages, each sent to only one recipient, also counts as 50 "relays." Relay counters are reset each night at midnight in the US Eastern time zone.
	www.dnsexit.com /Direct.sv?cmd=mailRelay (573 words)

	BT Infonet: SMTP Relay
		BT Infonet SMTP Relay is a value-added messaging service that increases the level of security and reliability for the exchange of email over the Internet.
		Internet communication is improved by implementing SMTP Relay as service resilience and service level agreements help to ensure that mail gets delivered.
		BT Infonet SMTP Relay is a value-added messaging service that delivers the level of security and reliability clients and business partners need to safely exchange email over the Internet.
	www.bt.infonet.com /services/messaging/smtp_relay.asp (296 words)

	1st SMTP Server - personal SMTP server for direct sending - free downloads
		In most cases your SMTP server is not accessible to you anymore since you are trying to get to it from outside of your ISP's network.
		If you use our 1st SMTP Server, you will not have that problem since it is going to deliver your email directly to it's destination bypassing your ISP's SMTP server.
		When you use 1st SMTP server, you don't have that problem, because it is going to send email directly without using any ISP.
	www.emailarms.com /products/1st_smtp.html (850 words)

	To prevent SMTP relaying with Microsoft Exchange Server
		Relaying is the transfer of messages via SMTP from one server to another.
		You'll want to prevent unauthorized senders -- in other words, spammers -- from using your Exchange Server as an SMTP relay to hide the real origin of their messages.
		Exchange Server 5.0 is vulnerable to unauthorized relaying if you allow local SMTP users -- as you probably would if you have users connecting with a POP client.
	www.slipstick.com /exs/relay.htm (291 words)

	Gradwell: Hosting Services - SMTP relay
		SMTP Relay lets you use the same SMTP (sending mail) server, regardless of where you are, or which ISP your computer is connected to.
		Technical tip: you can relay out via relay.gradwell.net on ports 25 and port 225, via any SMTP AUTH compliant email client (e.g.
		Here are step-by-step instructions for configuring your email client to use SMTP Relay.
	www.gradwell.com /products/hosting_smtp_relay.php (404 words)

	Tutorial: SMTP Relay (Macintosh)
		In the "SMTP Relay Personality" field choose the personality previously set up for the STMP relay from the menu.
		For example, if you bring your computer to work, you can easily change your SMTP relay to a personality which uses a different ISP to send mail through your work connection.
		Or you can set the SMTP relay personality to "None" so that you can send mail using the settings specified for each personality.
	www.eudora.com /techsupport/tutorials/mac_smtp_relay.html (351 words)

	Network and Systems Services: SMTP-Relay Services
		For a detailed description of the process and the initial proposal that was sent to the local system administrators, please see the following documents:
		We have seen a number of hosts that have a variety of failures to comply with the SMTP protocol.
		The most notable situation pertains to mailers that entirely ignore the 400-level response and incorrectly attempt to continue with the SMTP dialog.
	www.tamu.edu /network-services/smtp-relay/greylisting.html (673 words)

	XCON: How to Configure the IIS SMTP Service to Relay SMTP Mail
		To relay messages to the Internet, be sure that your ISP's DNS server is located on the DNS tab or that you are using a DNS server that has access to Internet Mail Exchanger (MX) records.
		The local domain is the one that will be hosted by this SMTP server (and mail will be placed in the Drop directory in the case of IIS 4.0).
		When you set relay restrictions, you do not have to stop or restart the service; the settings take effect immediately, even for established connections.
	support.microsoft.com /kb/q230235 (546 words)

	Index of relay-ctrl
		relay-ctrl SMTP Relaying Control for qmail and tcpserver Bruce Guenter Version 3.1.1 2002-04-26 This set of programs controls access to relaying for users that authenticate using either POP3 using the qmail-popup/qmail-pop3d or pop3front servers, or IMAP using Courier IMAP.
		Requirements: - You must be using either qmail-popup/qmail-pop3d or pop3front with either tcpserver or tcp-env to serve POP3 OR - You must be using Courier IMAP to serve IMAP.
		- You must be using tcpserver with qmail-smtpd or smtpfront to serve SMTP.
	untroubled.org /relay-ctrl (560 words)

	Local SMTP Relay Server - send emails from your local PC
		Local SMTP Relay Server is a SMTP server program for Windows that lets you send email messages directly from your computer.
		You can use it instead of your ISP's SMTP server to increase your email security and privacy due to your email messages will be delivered directly to the mailboxes of your recipients.
		Local SMTP Relay Server is very fast and reliable, it has a flexible protection that lets you protect the server from the outside of the Internet.
	www.getfreefile.com /localsrv.html (671 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.
		AuthSMTP is an authenticated SMTP mail relay (or smarthost) email service designed to solve most of the problems experienced when sending mail and offers many additional, advanced features - all for a very low cost
		Choose the box below that best describes you to view just some of the features and benefits then click Tell Me More to continue or contact us if you have any questions.
	www.authsmtp.com (222 words)

	SMTP Relay Service Description
		SMTP is used by Mail User Agents (MUA) to send messages, and by Mail Transport Agents (MTA) to deliver messages to their destinations.
		Email larger than 20MB will be rejected by the smtp server.
		Email is a very poor method to send data files because of the special encoding required to transmit the data in email form.
	open-systems.ufl.edu /services/smtp-relay (387 words)

	SourceForge.net: Smtp Open Relay Checker
		Donate to project Stats - Activity: 77.23% RSS
		Smtp Relay Checker is a network open mail relay checker.
		It is muti-threaded so it can be used to scan vast networks quickly, it is fully configurable so it can be adjusted to suit any need, and the scan results can be displayed in HTML.
	sourceforge.net /projects/smtprc (163 words)

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