SPFを検証してくれるメールアドレス その2

gmail - spf-test@openspf.org - Is it working? - Stack Overflow

Many of these have been setup for months, let alone the typical 48 hour DNS refresh period. When sending email to:

check-auth@verifier.port25.com

I get back a PASS on SPF, from all domains

spf-test@openspf.orgよりも上記のほうが判定結果が圧倒的に分かりやすい。