kitterman spf - SERP Analysis

https://www.kitterman.com/spf/validate.html

https://www.kitterman.com/spf/getspf3.py?serial=fred12&domain=%24

https://autospf.com/spf-record-tester/kitterman-spf/

https://www.duocircle.com/content/spf-record-tester/kitterman-spf

https://mxtoolbox.com/spf.aspx

https://www.spf-record.com/spf-lookup/www.kitterman.com

https://autospf.com/blog/kitterman-spf-check-a-comprehensive-guide-to-performance-analysis/

https://marketingservice.s3.ap.cloud-object-storage.appdomain.cloud/step-by-step-tutorial-verifying/spf-records-with-kitterman.html

https://www.duocircle.com/what-is-kitterman-spf-and-how-does-it-work

https://datatracker.ietf.org/doc/html/rfc7208

http://www.open-spf.org/action_browse_id_Tools_revision_2/

https://marketingservice.s3.ap.cloud-object-storage.appdomain.cloud/how-to-implement-kitterman-spf/email-security-and-deliverability.html

https://www.spamresource.com/2016/10/checking-spf-record-with-kitterman-spf_10.html

http://www.open-spf.org/action_history_id_Scott_Kitterman/

https://www.linkedin.com/posts/sachin-p-v_demystifying-spf-records-a-deep-dive-into-activity-7316113943427534848-Ln4M

https://www.reddit.com/r/sysadmin/comments/6zx8xx/spf_noob/

https://serverfault.com/questions/679069/aws-kitterman-spf-record-test-failing

https://sugarclub.sugarcrm.com/explore/help-forums/market/f/sugar-market-questions/7041/how-to-verify-your-sugar-market-spf-dkim-and-dmarc-authentications-are-setup-correctly

http://spf.marketvision.ch/

https://powerdmarc.com/top-spf-checkers/

https://datatracker.ietf.org/doc/html/draft-kitterman-4408bis-00

https://www.rfc-editor.org/rfc/rfc6652.html

https://stackoverflow.com/questions/38377553/why-does-this-spf-record-fail

https://published.gitlab.io/email-security/navigating-spf-records-tools/for-effective-checking.html

https://community.spiceworks.com/t/spf-too-many-included-lookups/679022/2

http://help.persistiq.com/en/articles/433301-spf-and-dkim-authentication

https://tracker.debian.org/spf-engine

https://blog.warmy.io/blog/how-to-use-spf-flattening-tools-to-optimize-your-email-deliverability/

https://help.bitsighttech.com/hc/en-us/articles/21988254028567-How-to-Create-a-Sender-Policy-Framework-SPF-Record

https://repology.org/project/spf-engine/versions

https://serverfault.com/questions/591046/why-does-the-mxtoolbox-spf-record-checker-not-like-my-spf-record

https://community.spiceworks.com/t/does-anyone-know-of-a-reliable-service-to-test-spf-rules/803822/2

https://www.spf-record.de/spf-lookup/www.kitterman.com

https://support.appliedi.net/kb/validating-spf-records/

https://github.com/spf-tools/spf-tools

https://snippets.wpcms.ninja/useful-tools/

https://salsa.debian.org/kitterman/postfix-policyd-spf-perl

http://spf.pymilter.org/web/20190301061134/http:/www.openspf.org/Tools.html

https://easydmarc.com/

https://dmarcian.com/

https://easydmarc.com/tools/spf-lookup

https://www.zoho.com/toolkit/spf-record-lookup.html

https://dmarcly.com/tools/spf-record-checker

https://dnschecker.org/spf-record-validation.php

https://fraudmarc.com/spf-record-check

https://mxtoolbox.com/SPFRecordGenerator.aspx

https://spf-checker.org/

https://powerdmarc.com/spf-record-lookup/