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Sender Policy Framework - SPF
SPF is an open standard whose goal is to help stop forgery of e-mail domains and some types of spam as well. SPF helps protect the envelope return path.
AOL's fight against Spam.
AOL is working with industry groups and the Internet Engineering Task Force to examine how to standardize technologies like SPF across the global internet. We continue to work with these groups on specifications for CallerID and DomainKeys in addition to the SPF Standard. AOL is continually evaluating standards that provide enhancements to spam fighting for AOL members and the Internet community as a whole. What is SPF?
A significant majority of spam is forged. SPF allows your mail servers to easily distinguish forgeries from real mail. 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 Facts! - SPF is indicated by a TXT DNS record .
- SPF is a counterpart of the MX list.
- Because SPF protects the return-path, users protected by SPF will stop getting bounces for messages they did not send.
How do I setup SPF?
Publishing SPF is easy and requires no software upgrades on the part of the publisher. Using SPF to block spoofed emails requires fairly simple upgrades to inbound mail servers. Several major MTAs have SPF modules already. More can be found at http://www.openspf.org/downloads.html
What is AOL's SPF record?
v=spf1 ip4:152.163.225.0/24 ip4:205.188.139.0/24 ip4:205.188.144.0/24 ip4:205.188.156.0/23 ip4:205.188.159.0/24 ip4:64.12.136.0/23 ip4:64.12.138.0/24 ptr:mx.aol.com ?all
Better impression with SPF!
Publishing an SPF record shows a company is interested in helping stop the forgery of its own domain.
How do I find out more about SPF?
The official SPF web site can be found at http://www.openspf.org
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