~/tools / spf-checker

SPF Checker

Check SPF record. Counts DNS lookups against the 10-lookup limit, flags `+all` security holes, and identifies common mistakes.

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[ WARNING ] Soft fail (~all). Unauthorized senders flagged but not rejected. Consider -all for stronger protection.
── output ─────
v=spf1 a mx ip4:82.113.101.0/24 ip4:195.76.56.216/29 ip4:167.89.108.175 include:spf.mail.telefonica.de include:mailservices-sc.de ~all
DNS lookups
4 / 10
All mechanism
~all
Includes (2)
spf.mail.telefonica.de, mailservices-sc.de
IP4 (3)
82.113.101.0/24, 195.76.56.216/29, 167.89.108.175
IP6 (0)
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// Save o2.de → we'll run this daily and alert on changes. /signup →