SPF Record Syntax Checker
Validate SPF string length, mechanisms, and common misconfigurations.
How it works
Check SPF syntax before you publish
Paste a v=spf1 … string → click Check SPF syntax → see lookup count, length, and common mistakes. Does not query live DNS.
Results appear here after you click Check SPF syntax.
Ready to send with MailShrine?
New accounts get free signup credits. Fix the copy, then send from MailShrine.