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Topic: Sender Policy Framework

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	DRAFT-Sender Policy Framework (SPF) at CanadaEmails.com
		SPF processing may occur as early as the MAIL FROM stage of an SMTP transaction or as late as the display stage in a Mail-User Agent.
		SPF can be used to verify the sender of a message based on envelope information available at SMTP time or according to the headers after an SMTP transaction has completed.
		SPF merely makes it possible for policy decisions to be made with confidence at the sender-domain level.
	www.canadaemails.com /Sender_Policy_Framework-SPF.htm (6349 words)

	SPF - Sender Policy Framework
		SPF relies on a DNS (Doman Name Service) Zone TXT entry to indicate which MX (mail) servers are allowed to handle mail for the zone and what zones if any it handles mail for.
		SPF can also help block the flood of needless 'bounce' (return to sender) messages created by email worms which put the addresses of innocent third parties in their Return-Path headers.
		CanadaEmails is an early adopter of the SPF (Sender Policy Framework) and implemented SPF for SMTP and DNS in Spring 2004.
	www.canadaemails.com /spf.htm (2185 words)

	Sender Policy Framework - Wikipedia, the free encyclopedia
		SPF protects the address in the Return-Path, that is the address to which bounces would be sent if the mail is not delivered.
		SPF does not validate that a given e-mail actually comes from the claimed user, because it operates at the network level.
		The SPF concept was presented at YAPC and OSCON (O'Reilly Open Source Convention) in 2003, in a short paper titled "Repudiating Mail-From" written by Paul Vixie in 2002.
	en.wikipedia.org /wiki/Sender_Policy_Framework (2421 words)

	What is SPF? - A Word Definition From the Webopedia Computer Dictionary
		Short for Sender Policy Framework, an extension of SMTP that stops e-mail spammers from forging the “From” fields in an e-mail.
		SPF is one method that can be used to stop spam from being sent using unauthorized domain names.
		However, it should be noted that SPF only stops the spammer from forging the “From” field in the e-mail and does not stop the spammer from sending e-mails from a domain in which it is a member.
	www.webopedia.com /TERM/S/SPF.html (262 words)

	Sender Policy Framework \|SPF
		SPF may be hacked by the spammers before it is fully implemented.
		Sender ID frame work is the result of Microsoft's Caller ID for E-Mail proposal, Meng Wong's Sender Policy Framework (SPF), and a third specification called the Submitter Optimization.
		The Sender ID Framework is tasked with verifying that each e-mail message originates from the Internet domain from which it claims to come based on the sender's server IP address.
	www.blacklistedip.com /spf_work.php (550 words)

	An Overview of the Sender Policy Framework
		Sender Policy Framework (SPF), formerly Sender Permitted From, is an extension to the SMTP standard.
		SPF is publishing "reverse MX" records in DNS which tells the mail sender which machines send mail from the domain.
		SPF has a number of mechanisms defined in the SPF draft standard, but SPF is so flexible and extensible that new mechanisms can be implemented without having to rewrite the standard.
	www.msexchange.org /tutorials/Sender-Policy-Framework.html (1830 words)

	Sender Policy Framework
		Sender Policy Framework (SPF) was designed to counter the problems of forged email: usually found in spam, viruses or deliberate forgeries.
		SPF data is published in these TXT records.
		The easiest way to do this currently is by using the SPF Publisher Wizardon the SPF homepage.
	support.easydns.com /tutorials/spf (398 words)

	Sender Policy Framework (SPF) (Site not responding. Last check: 2007-11-02)
		SPF is a community effort that is rapidly gaining ground.
		SPF requires that the company of the sender has published its mail server in an SPF record.
		SPF works by domains publishing a text record in the DNS of those domains to publicly inform which machines send mail from the domain.
	support.gfi.com /manuals/en/me11/me11manual-1-17.html (1568 words)

	CrystalTech Forums - SPF (Sender Policy Framework) (Site not responding. Last check: 2007-11-02)
		SPF should be implemented in your DNS as explained at http://postmaster.aol.com/spf/details.html.
		SPF doesn't eliminate spam, but if it is widely used, it will eliminate spoofed spam, making it much easier to track and block spammers.
		SPF is not used to prevent spam at all, just to enforce a sender validation list.
	www.crystaltech.com /forum/topic.asp?TOPIC_ID=8237 (2385 words)

	[No title]
		Compliant domain holders publish Sender Policy Framework (SPF) records specifying which hosts are permitted to use their names, and compliant mail receivers use the published SPF records to test the authorization of sending Mail Transfer Agents (MTAs) using a given "HELO" or "MAIL FROM" identity during a mail transaction.
		SPF Records An SPF record is a DNS Resource Record (RR) that declares which hosts are, and are not, authorized to use a domain name for the "HELO" and "MAIL FROM" identities.
		Both the sender and the rejecting receiver need to be aware that the explanation was determined by the publisher of the SPF record checked and, in general, not the receiver.
	www.ietf.org /rfc/rfc4408.txt (11027 words)

	[No title]
		SPF is an open standard whose goal is to help stop forgery of e-mail domains and some types of spam as well.
		Importantly, SPF works before the message body is transmitted, saving you the bandwidth cost of downloading the message and the CPU cost of filtering it.
		SPF is indicated by a TXT DNS record.
	postmaster.aol.com /spf/details.html (241 words)

	qmail SPF (Sender Policy Framework) patch
		SPF is something like a DNS based "reverse MX" system to designate permitted senders for mails depending on the domain name.
		It is still a release candidate because the final SPF draft isn't out yet (I consider it final when it gets an official RFC).
		The explanation is the line returned to the SMTP sender when a mail is rejected at the SMTP level.
	www.saout.de /misc/spf (618 words)

	MailEnable Knowledge Base - Sender Policy Framework (Site not responding. Last check: 2007-11-02)
		Sender Policy Framework (SPF) is a method of detecting when an email sender is forging their sender address.
		It does this by confirming with the senders alleged domain (via DNS lookups) as to whether the connecting IP address, or other various details, is valid.
		SPF tests return one of seven results, which are outlined below.
	www.mailenable.com /kb?ID=ME020345 (275 words)

	SPF Sender Policy Framework
		Xwall started SPF support last year and integrated SPF testing in the state of the art spam filter to produce a very effective new spam block..
		SPF is a text record added to the MX records of the DNS server holding your Domain information.
		SPF is gaining momentum but some setup the record wrong and many don't have one yet.
	www.xwall.us /xwallspf.htm (464 words)

	Secure Computing - Sender Policy Framework Statistics
		The new study shows that corporations are steadily adopting Sender ID, with 23 additional Fortune 1000 companies publishing SPF records since CipherTrust last reported on the deployment of the e-mail authentication standard in August, representing an increase of nearly 75 percent in three months.
		In fact, the recent increase in the adoption of Sender ID has increased the number of spam messages blocked by checking SPF records by 230% since June of this year.
		Additionally, while some have raised concern around spammers publishing their own SPF records, a major benefit of that is the enhancement of enforcement and investigative efforts by having the ability to verify the identity of the sender.
	www.ciphertrust.com /spf_stats (303 words)

	easyDNS Tutorial - SPF protocol
		SPF, or Sender Policy Framework, is one of the most promising new ways to cut down on "spam," or unsolicited commercial email.
		This allows email systems to check on the sender of a message to be sure it comes from a legitimate source, and refuse email that does not.
		There is a very short survey at the end of the tutorial so if you have any comments or suggestions on how we could improve these tutorials please let us know.
	www.easyspf.com (203 words)

	Sender-ID, Sender Policy Framework \| Enterux Solutions (Site not responding. Last check: 2007-11-02)
		The Sender ID Framework is an e-mail authentication technology protocol that helps address the problem of spoofing and phishing by verifying the domain name from which e-mail is sent.
		Sender ID validates the origin of e-mail by verifying the IP address of the sender against the purported owner of the sending domain.
		The Sender ID Framework looks up the SPF record of the domain that Sender is using for sending the mail.
	www.enterux.com /en/solutions/sender-id-spf (339 words)

	Hexamail Adds Sender Policy Framework and Domain Keys Features
		SPF fights sender address forgery and makes it easier to identify spoofed email.
		Domain owners identify their legitimate sending mail servers in DNS and Hexamail verifies SPF records and so autoamtically distinguishes authentic messages from forgeries even before any message data is transmitted.
		These new sender verification and anti forgery technologies ensure that the total protection offered by Hexamail is maintained as adoption of the technologies spreads.
	www.prweb.com /releases/2006/9/prweb431580.htm (576 words)

	SPF Test - Sender Policy Framework Validation Tool - SPF File Testing
		SPF (Sender Policy Framework) fights return-path address forgery and makes it easier to identify spoofs.
		SMTP receivers verify the envelope sender address against this information, and can distinguish authentic messages from forgeries before any message data is transmitted.
		This SPF testing tool is brought to you by the good folks at DNS Report and DNS Stuff, an excellent resource for network and domain name tools.
	www.seoconsultants.com /tools/spf (360 words)

	GetActive - WORD OF NET - Email Sender Authentication
		They are competing methods for verifying the identity of email senders, and they enable your email client to confirm that messages are coming from the domain they appear to be from.
		When anyone receives mail purporting to be from your organization's domain, sender authentication systems will be able to check your DNS record to see if the sending mail server is authorized to mail in your name.
		Email sent to MSN and Hotmail addresses that cannot be authenticated by Sender ID will now display a warning message to recipients; these flagged messages will continue to be delivered to the inbox.
	www.getactive.com /wordofnet/authentication070805.html (766 words)

	[SPF] Sender Policy Framework (Site not responding. Last check: 2007-11-02)
		The Sender Policy Framework (SPF) system is a way to stop people from forging your domain name in email.
		SPF council, which sounds more impressive than it really is. Mostly it is just a way of letting the SPF community make final decisions on stuff.
		My main goal as an SPF council member is to try and get an SPF-classic draft spec through the IETF.
	www.schlitt.net /spf (242 words)

	Sender Policy Framework
		In order for SPF to work you need to publish a list of IP addresses that are used to send e-mails to other users on the Internet.
		SPF can effectively stop viruses or worms from an infected machine that send out thousands of message to everyone found in your address book.
		Each element in the SPF string is separated by a white space.
	www.petri.co.il /sender_policy_framework.htm (848 words)

	What is Sender Policy Framework (SPF) all about?
		The basic idea behind Sender Policy Framework (SPF) is simple: whenever an email is received a check is made to see if the server which sent it is allowed to send emails on behalf of the sender’s domain.
		SPF works by asking somedomain.com if 121.122.123.124 is allowed to send mail on its behalf.
		For Sender Policy Framework (SPF) to work, the sender’s domain (somedomain.com in our example) must publish, via DNS TXT records, the hosts which are allowed to send mail on its behalf.
	kbase.gfi.com /showarticle.asp?id=KBID002347 (441 words)

	UMR - IT Sender Policy Framework \|\| University of Missouri-Rolla (Site not responding. Last check: 2007-11-02)
		Another major benefit to SPF is that if a domain publishes its SPF record and one of its subscribers begins sending out tons of spam, it is easy to track the domain down and identify who the spammer is (or might be).
		ISPs who are also participating in SPF will be notified of which UMR servers are authorized to send "@umr.edu" based email, but they will also be asked to not block unauthorized email.
		Under the full implementation of SPF, participating ISPs will be advised to rigorously block all email that is marked as "@umr.edu" but does not match the published UMR SPF record.
	campus.umr.edu /umrit/security/SenderPolicyFramework.html (768 words)

	[SPF] Sender Policy Framework Test Suite
		The SPF Testing System is a collection of perl scripts, unix shell scripts (used to run the perl scripts) and test data files.
		It is designed to see how well an SPF implementation conforms to the official SPF specification, how well it conforms to the common API used by several different SPF implementations, and to catch many common bugs.
		The good news is that I have been able to take the ABNF for the SPF record from SPF specification and convert it into a regular expression that will match all valid SPF records, and not match invalid ones.
	www.schlitt.net /spf/tests (650 words)

	SPF: A Sender Policy Framework to Prevent Email Forgery (via CobWeb/3.1 planetlab2.cs.virginia.edu) (Site not responding. Last check: 2007-11-02)
		Read the definitive Sender Authentication Deployment White Paper that discusses SPF.
		SPF has been receiving a lot of recent coverage.
		SPF is ushering in a new set of anti-spam systems, where email is spam unless proven otherwise.
	www.openspf.org.cob-web.org:8888 (137 words)

	Sender Policy Framework
		Make sure your SPF data contains the string include:easydns.com.
		If you are using the SPF Wizard, enter "easydns.com" (without the quotes) in the include: section of the wizard.
		Currently, easyDNS mail forwarders and spoolers do not do SPF lookups or enforce SPF.
	support.easydns.com /spf.php (426 words)

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