What SPF Resources Are Available Now That OpenSPF.org Is Gone?

Posted by Viola Eva on April 1, 2019

Viola Eva

Viola Eva

SEO Consultant from Flow SEO

Published on April 1, 2019



Out of all emails sent out in December 2018, 57 percent of them were spam. This shows just how big of a challenge spam is and why finding a solution is essential.  From 2003, the OpenSPF.org website had become the popular starting point for developers and mail server administrators that were implementing SPF rules.  SPF stands for Sender Policy Framework, and it’s a widely used tool to fight spam. The site also served as a resource for those interested in getting involved in the community of SPF developers and maintainers.


OpenSPF.org disappeared from the internet in February 2019. We took some time to try and understand what happened to the website. We also attempt to identify some resources which are still available to fill the void left by the demise of the website.

Origins of OpenSPF.org


OpenSPF.org provided information about SPF and its benefits for users. It also provided users with news, tools for configuring SPF, forums and FAQs.


SPF is a method of informing servers whether a specific mail server is authorized to send an email for a particular domain. Hence, it can detect whether an email address is authentic or fake, before allowing it to pass into an inbox.


An SPF record increases the likelihood that emails sent by valid addresses are delivered. Without it, your email could be categorized as spam. It also protects against malicious emails sent through your domain by spammers.


Meng Weng Wong is widely credited as the author of SPF. However, his inspiration came from various sources. Paul Vixie’s paper entitled Repudiating Mail-From led to two proposals: Reverse MX by Hadmut Danisch and Designated Mailer Protocol by Gordon Feyck. Wong combined these proposals to create SPF in 2003.The several volunteer groups involved in the SPF project included the SPF council, a support team, webmasters and mailing list moderators.



What Happened to OpenSPF.org?


OpenSPF.org simply disappeared from the Internet. There was never an official announcement of its closure, and the last archive of the site is from February 2019. In April 2019, users of online platform Reddit were trying to find out what happened to the site. Some users attributed the demise of the site to a lack of funds.


While OpenSPF.org may no longer be available, several websites and tools are still available for people writing and testing SPF rules for their mail servers.




These sites provide tools similar to those that were provided by OpenSPF.org.


Kitterman Technical Services


This website offers tools for setting up an SPF record. Kitterman’s tools are unique and employ Python software known as pyspf. One of the available tests assesses whether your SPF record is valid. Another test checks the performance of your SPF record based on which IP addresses from which the emails come.




Appmaildev.com is another site which allows users to test their SPF records. You are given a test email address to which you can send an email. After that, an SPF report is generated. Appmaildev.com also has tutorials available for adding signatures and stopping spam emails. For less advanced users, SPF-related topics can be tricky, making this a handy tool.


MX Toolbox


MX Toolbox allows users to look up their SPF records. With this website, users can publish a list of domains that are authorized to send an email on their behalf. This list ensures that malicious mail senders have nowhere to hide, thereby reducing spam in the process. You can also check if your email server has been blacklisted through blacklist check.




Beveridge Hosting DNS Lookup is a tool made available by the web hosting company bevhost.com. It provides you with a form where you can simply enter a hostname or IP address and submit the form. The site will then verify if the hostname or IP address is authentic.



SPF-Related News


If you’re looking for news on SPF, several websites can provide helpful information.




This blog has useful news on SPF. While it is not exclusively focused on SPF, it has several articles on the topic. It contains articles on security awareness, something helpful for someone who seeks to protect their domain from spam. Recent articles on the blog look at whom cybercriminals are targeting and tips for fraud defense.

Active Campaign


This site shows users how to set up an SPF record, as well as how to verify that the SPF record has been set up correctly. It also looks at using Google Postmaster to check on your domain’s credibility. This verification process is vital because you remain vulnerable to threats if you have not set up your SPF right.




The following websites provide FAQ sections which answer important questions on SPF.




The American software company, Salesforce’s website, has an FAQ section dedicated to SPF. The section provides information on what SPF record looks like, why it’s important and provides details on how to create it.




Cisco is a company that makes and sells telecommunications technology. The company’s FAQ section answers important questions for SPF users. Beyond helping users get their record, it also provides answers on how to enable SPF check for spam.




Infusionsoft is an email marketing and sales platform. The platform explains how SPF works and how to set up a record. People sending mail through Infusionsoft don’t need an SPF record, because the firm handles this on their behalf. The site also provides a guide for configuring your SPF records.


Emails and Domains Can Still Be Verified


OpenSPF.org was an important starting point for people looking for information related to SPF. While it no longer exists, there are many websites available which can provide similar services. All the sources provided have the same goals: helping you reduce spam, ensuring that authentic emails are not blocked and giving a chance for people who deal with SPF-related issues to find answers to any challenges they encounter.

Viola Eva

Viola Eva

SEO Consultant from Flow SEO

Published on April 1, 2019