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Topic: SPF

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	PCWorld.com - AOL Tests New Spam-Blockers
		SPF is designed to eliminate e-mail forgeries by enabling organizations to specify which servers can send mail on behalf of their Internet domain, according to Nicholas Graham, an AOL spokesperson.
		SPF patches a hole in Simple Mail Transfer Protocol, which is used to route e-mail messages among in-boxes.
		SPF also causes performance problems under certain circumstances and has features that spammers could exploit to slow down and derail the system, he said.
	www.pcworld.com /news/article/0,aid,114411,00.asp (693 words)

	SPF - Internetnews.com - Webopedia.com
		In order to use SPF, the domain sending e-mails must establish an SPF record that is published in DNS records.
		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.
	inews.webopedia.com /TERM/S/SPF.html (221 words)

	SPF Missions Statement and Bylaws
		The SPF seeks to develop and utilize educational materials and opportunities that are fun, factual, proactive, and informative.
		The basis of authority for the SPF is the students’ approval of the Shoreline Initiative (student elections, spring, 1999), a $3.00 per student (undergraduate and graduate) per quarter lock-in fee.
		Internal applicants shall be prohibited from the use of the SPF e-mail listserv, or any other internal communication capabilities that the organization may have, in the discussion, decision, or any related matters associated with the relevant self-introduced project proposal.
	spf.as.ucsb.edu /bylaws.htm (3777 words)

	Considered Harmful: SPF...
		It doesn't do you any good to publish SPF records and not have anyone else use them, or to not have them actually refuse to accept messages claiming to be from you but which do not originate from your designated mail servers.
		Some alternatives to SPF validate both the envelope sender address as well as the header "From:" field within the body of the message, which means that they also break most mailing lists, in addition to everything else.
		As bad as SPF is, at least it doesn't validate the header "From:" field, so it may break forwarding and aliases, at least it doesn't break proper mailing lists.
	bradknowles.typepad.com /considered_harmful/2004/05/spf.html (949 words)

	SPF Overview \| Linux Journal
		SPF is an emerging antiforgery standard that aims to prevent worms, viruses and spam from forging arbitrary e-mail addresses as the envelope sender in SMTP.
		SPF plugins that don't understand those mechanisms will return unknown, and your domain will be treated as though it did not have an SPF record at all.
		SPF accommodates these users: the advanced mechanism (see the "Advanced SPF" sidebar) is a way to exempt certain users from being required to use their ISPs' SMTP servers.
	www.linuxjournal.com /article.php?sid=7327 (3331 words)

	NewsForge \| A closer look at SPF (Site not responding. Last check: 2007-10-21)
		The SPF ("Sender Policy Framework") is a framework designed prior to the SenderID initiative, which is being considered as a standard for email authentication by major players like Sendmail, Microsoft and the IETF, among others.
		In order to deploy SPF -- and most importantly -- for it to work appropriately, both the receiving party and domain owner need to make modifications to their servers, in the case of the receiving party on the SMTP server, and for those wishing to protect their domain from spoofing through a special DNS configuration.
		Although SPF requires close cooperation between domain owners and mail server administrators in order for it to achieve critical mass, it is a step in the right direction.
	business.newsforge.com /business/04/09/10/1836229.shtml (1273 words)

	Dri-Zone job profiles and articles - Indicators of SPF Performance (Site not responding. Last check: 2007-10-21)
		SPFA recommends SPF's density be 2.8 to 3.0 pcf (45 to 48 kg/m³) and compressive strength meet or exceed 40 psi (280 kPa).
		The purpose of Phase I was to "establish and/or verify existing performance attributes for SPF roof systems." Phase I found the average field sample's compressive strength was 58.6 psi (404 kPa) and density was 3.22 pcf (52 kg/m³).
		And it is possible that SPF and elastomeric coatings may not have the ability to accommodate minor substrate movement.
	www.dri-zone.com /testimonials2.html (593 words)

	An E-Mail Marketer's Guide to Deliverability, Part 1: SPF
		SPF, Sender ID, and DomainKeys are relatively new technologies on the cutting edge of the fight against spam and false positives.
		SPF relies on what's called the "envelope address," the sender address appearing as the "return-path" in the e-mail header.
		SPF doesn't confirm the message came from a specific user at that domain name, only that it came from that domain name's server.
	www.clickz.com /experts/em_mkt/em_mkt/article.php/3465711 (957 words)

	libspf2 - SPF Library - Home (Site not responding. Last check: 2007-10-21)
		Developers should be using this as the reference for new SPF applications.
		SPF is a moderately complex system, and it is critical that SPF deployments from different vendors be able to interoperate correctly.
		Unlike most other developers of SPF implementations, our extensive work on the SPF test suite has given us a broad understanding of the state of art of SPF implementations.
	www.libspf2.org (373 words)

	SPF, MTAs and SRS \| Linux Journal
		SPF's design philosophy is that it's better to fail obviously with a hearty error message than to risk silently burying mail in a spambox.
		UNKNOWN: a permanent error caused the SPF lookup to abort; perhaps there was a syntax error in the record, or maybe the record pointed to another domain that doesn't have an SPF record.
		SPF simply gave everyone a standard way to do what they already were doing piecemeal.
	new.linuxjournal.com /article/7328 (2220 words)

	Why you shouldn't jump on the SPF bandwagon
		If you check SPF records strictly for anything larger than a toy domain with a handful of users, then you're likely to be rejecting genuine email which is sent to you or your users.
		Those who believe SPF to be an insanely stupid idea will strongly resist, and those who are simply uninterested in SPF have little reason to want to use it.
		Since SPF can only really be used for evaluating the trust level of the host which is actually sending the mail, CSV is sufficient to use as a viable alternative.
	david.woodhou.se /why-not-spf.html (1715 words)

	Skin Types, Sunscreens & SPF
		The SPF number on the product's label refers to the strength of protection, and the length of time a sun-screening product will allow your skin to be in the sun without burning - relative to the length of time bare skin (or skin without the product applied) would burn or redden.
		To sum that up, the SPF number tells people how much longer they can last out in the sun with protection for their skin, without being burned.
		The higher the SPF number, the longer the period of protection against the sun.
	www.safetan.com.au /articles/skintypes.html (780 words)

	Durascreen Once A Day SPF
		SPF refers only to UV-B rays (which are mainly responsible for sunburn).
		Dermatologists recommend a sunscreen of at least SPF 15 for anyone who is going to be out in the sun for longer than 10 minutes, regardless of your skin type.
		Most dermatologists agree that higher SPF products (SPF 30 or 45) should be used by those who need more protection: people with extremely fair, freckled skin or those who have a family history of skin cancer.
	www.durascreen-usa.com /info2.asp (232 words)

	Solar Weave - Solar Protective Factory
		SPF®, Solar Protective Factory has been supplying fabrics for over 12 years to many national and international companies that provide sun protective apparel.
		The SPF® STORE now offers such a product line and is proud to be the leader in offering tested, rated and certified UV protection.
		SPF®, the Solar Protective Factory, IS the world’s leader in sun protective apparel and fabrics.
	www.spffabrics.com (399 words)

	Sender Policy Framework - a Whatis.com definition - see also: SPF, sender permitted from (Site not responding. Last check: 2007-10-21)
		Sender Policy Framework (SPF) is an anti-spam approach in which the Internet domain of an e-mail sender can be authenticated for that sender, thereby discouraging spam mailers, who routinely disguise the origin of their e-mail, a practice known as e-mail spoofing.
		An SPF client program performs a query searching for the correct SPF record, in order to determine whether a message comes from an authorized source.
		SPF and other authentication-based measures are designed to redress a vulnerability in Simple Mail Transfer Protocol (SMTP), the main protocol used in sending e-mail, which does not include an authentication mechanism.
	searchsecurity.techtarget.com /sDefinition/0,,sid14_gci953520,00.html (295 words)

	SPF - Sender Policy Framework - authenticating e-mail senders. (Site not responding. Last check: 2007-10-21)
		SPF is designed to prevent this happening, and works by a simple but ingenious method.
		SPF is free software, developed by a group of professional programmers in their spare time, because they were tired of getting false e-mails.
		Everything about SPF is free, including the information on how to install SPF records for your domain and how to check the incoming mail for bogus from addresses.
	spf.idimo.com (340 words)

	LWN: Blocking forgeries and spam with SPF
		SPF certainly will not solve the spam problem; spammers will just use domains that lack SPF information, open relays, or throwaway domains of their own.
		It will be made substantially easier if MUA developers get on the SPF bandwagon and steer the user into sending through the proper mail server, but it will also take a concerted effort by ISPs and employers to educate their users.
		The SPF authors are apparently relying on sites that forward mail for their users to take the initiative to implement SPF-compliant solutions and notify their users.
	lwn.net /Articles/55065 (2075 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).
		Local rules means: Rules that are executed before the real SPF rules for a domain would fail (fail, softfail, neutral).
	www.saout.de /misc/spf (618 words)

	SPF: Institute SPF - General - Goal and Purpose
		The Institut für Solartechnik SPF is part of the Hochschule für Technik Rapperswil HSR.
		SPF is involved in technology transfer between research and development centres on the one hand, and trade and industry on the other.
		Fig.1: Measuring devices on the roof of the Institute SPF in Rapperswil, Switzerland.
	www.solarenergy.ch /spf.php?lang=en&fam=41&tab=1 (245 words)

	AOL tests caller ID for e-mail \| Tech News on ZDNet
		The endorsement of SPF by the world's largest Internet service provider (ISP) could be critical to the evolution of a long sought e-mail verification standard and could encourage other major e-mail providers to implement it.
		There are currently at least two other competing technical specifications to SPF under review by a subcommittee of the Anti-Spam Research Group of the Internet Research Task Force.
		For example, an e-mail recipient would be able to look at an SPF record from AOL to ensure that e-mail appearing to originate from one of its servers--such as bob@aol.com--was actually sent from that address.
	news.zdnet.com /2100-3513_22-5145065.html (1010 words)

	Net a Few Phishes with SPF for Windows 2003
		Although SPF is seen as a major leap forward in combating spam, it won’t be able to have a large-scale effect until it is adopted en masse.
		SPF is an open source approach to combating spam.
		SPF is a technology framework that uses simple DNS (define) record lookups to verify the authenticity of a senders Internet domain.
	www.enterprisenetworkingplanet.com /netsysm/article.php/3413261 (1182 words)

	lf354, SoftwareDevelopment: An introduction to SPF (Site not responding. Last check: 2007-10-21)
		SPF stands for Sender Policy Framework and it aims to be an antiforgery standard to prevent the forging of e-mail addresses.
		SPF was born on the year 2003, his mentor, Meng Weng Wong picked up the best features of Reverse MX and DMP (Designated Mailer Protocol) to bring SPF to life.
		If are you worried about spam then SPF will help you, protecting your domain from forgeries, and all you have to do is to add a text line on your DNS server and configure your email server.
	cleanlaughs.com /LDP/linuxfocus/English/December2004/article354.shtml (1134 words)

	SPF and/or Sender ID
		SPF and Sender ID propose to solve this by providing a method whereby the owner of a domain name, such as example.com or our own maawg.org, can indicate which computers are allowed to send any e-mail messages that purport to be from that domain name.
		While this sounds simple, there are some important differences between the original SPF idea and its derivatives, including Sender ID – primarily in regards to which part of the message should be verified and how to interpret the intention of the domain owner.
		Because both SPF and Sender ID compare a domain with the most-recent source IP address of a message, anyone who re-sends a message must in effect take responsibility for that message as if it had originated within their own network.
	www.maawg.org /about/whitepapers/spf_sendID (2312 words)

	An Overview of the Sender Policy Framework
		SPF allows an Administrator of an Internet Domain to specify which machines are authorized to transmit e-mail from that domain.
		SPF makes it more difficult for spammers to send spam, because if they simply forge a "From" address from an address that implements SPF, receivers that implement SPF will ignore the e-mail.
		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 (1785 words)

	SPF, roofing that pays for itself...
		An SPF roof can Pay For Itself in less than 5 years by reducing energy costs.
		SPF systems install quickly, cleanly, and quietly, with little or no interruption of your daily operations, and can produce energy savings of 30% annually or greater.
		Our emergency dry-in teams are able to temporarily repair your buildings at the rate of 10,000 square feet per crew per day and more, by utilizing the SPF roofing systems.
	www.afroofing.com (159 words)

	Ultraviolet - Wikipedia, the free encyclopedia
		Because it does not cause reddening of the skin (erythema) it cannot be measured in the SPF testing.
		There is no good clinical measurement of the blocking of UVA radiation, but it is important that sunscreen block both UVA and UVB.
		Suntan lotion that partly blocks UV is widely available (often referred to as "sun block" or "sunscreen").
	en.wikipedia.org /wiki/Ultraviolet (2989 words)

	How to add SPF support to your Exchange Server
		SPF (Sender Policy Framework) makes it easy to counter most forged "From" addresses in email, and thus helps to counter e-mail spam.
		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.
	www.msexchange.org /articles/SPF-support-Exchange-freeware.html (1266 words)

	How SPF works
		SPF makes it easy for a domain, whether it's an ISP, a business, a school or a vanity domain, to say, "I only send mail from these machines.
		SPF aims to prevent spammers from ruining other people's reputations.
		If you do get spam that passed an SPF check, then you know you should hold the sending domain responsible for the message.
	spf.pobox.com /howworks.html (351 words)

	SPF
		And then there are the facts that: - SPF was born in a swamp of marketing with a shortage of technical clues compared to its predecessors and competitors.
		See for example http://www.nwfusion.com/news/2004/0722microtoen.html?net I thought that Microsoft was promising to support the IETF's compromise among SPF, Caller-ID, etc. That September date looks like the goal from http://ietf.org/html.charters/marid-charter.html Skimming the IETF MARID WG archives in http://www.imc.org/ietf-mxcomp/index.html makes any repetition of that date sound uninformed.
		I understand that SPF is not Caller-ID and that neither is whatever the IETF might someday bless.
	www.rhyolite.com /pipermail/dcc/2004/002299.html (378 words)

	SPF - DreamHost
		SPF, or Sender Policy Framework, fights return-path address forgery and makes it easier to identify spoofed e-mails.
		This is because domain owners identify all mail servers that send e-mail on their behalf within in their DNS entries.
		Go to http://spf.pobox.com/ and use their "SPF Wizard" to generate your SPF information.
	wiki.dreamhost.com /index.php/SPF (304 words)

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