https://dmarcian.com/spf-syntax-table/
SPF Record Syntax - dmarcian
spf record syntaxdmarcian
https://www.duocircle.com/content/sender-policy-framework/spf-record-syntax
Common SPF Record Syntax Errors And Their Solutions - DuoCircle
Learn how to fix common syntax errors in your SPF records for better email
spf record syntaxcommonerrorssolutionsduocircle
https://autospf.com/blog/how-spf-record-syntax-impacts-email-security-and-inbox-placement/
How SPF Record Syntax Impacts Email Security and Inbox Placement | AutoSPF
Apr 18, 2026 - SPF record syntax—specifically the v=spf1 declaration, the order and choice of mechanisms, their qualifiers.
spf record syntaxemail securityinbox placement
https://powerdmarc.com/dns-spf/
DNS SPF Record: Setup, Syntax & Common Errors | PowerDMARC
May 6, 2026 - Understand SPF record syntax, mechanisms, and DMARC alignment. Fix issues and improve inbox placement. See how
spf recordcommon errorsdnssetupsyntax