すべてのユーティリティ
メール / DNS
SPF レコードチェッカー
ドメインの SPF TXT レコードを検索して解析します。
このツールについて
Use this SPF checker online to validate your SPF record syntax and effective sender policy in seconds. It is a practical tool for email admins who want to reduce spoofing risk and improve deliverability.
The free SPF record checker helps you catch common mistakes like excessive DNS lookups or missing include chains. Clean SPF configuration supports stronger domain trust and more stable inbox placement.
本番利用には API をご覧ください： メール検証API
よくある質問
- What does an SPF checker validate?
- It verifies SPF syntax, mechanism order, and policy structure so you can confirm that authorized sending hosts are defined correctly.
- Why does SPF matter for deliverability?
- Mailbox providers use SPF as one of the authentication signals to evaluate whether a sender is legitimate.
- Can SPF alone stop spoofing?
- SPF helps, but strongest protection comes from SPF together with DKIM signing and DMARC policy enforcement.