--- title: "無料メールセキュリティツール | AutoSPF" description: "メール認証のための無料DNSルックアップツール。SPFレコードのチェック、DMARCポリシーの検証、DKIM鍵のルックアップ、BIMI、MTA-STS、TLS-RPTのテストが、すべて一か所で行えます。" image: "https://autospf.com/images/og-default.png" canonical: "https://autospf.com/ja/tools/" --- 100%無料 - アカウント不要 # 無料メールセキュリティ ツール 任意のドメインのSPF、DMARC、DKIM、BIMI、MTA-STS、TLS-RPTレコードをチェック。即座に結果が得られ、登録は不要です。 [ 最も人気 SPFレコードチェッカー SPFレコードを分析し、DNSルックアップを数え、完全なincludeツリーを視覚化します。10ルックアップ上限を超えているかどうかを確認できます。 ツールを使う ](/ja/tools/spf-checker/)[ 新着 ドメイン認証チェッカー 5つのメール認証プロトコル（SPF、DMARC、BIMI、MTA-STS、TLS-RPT）を一度にチェック。総合的な健全性スコアを取得します。 ツールを使う ](/ja/tools/domain-auth-checker/)[ DMARCレコードチェッカー DMARCポリシーを検証し、アライメント設定をチェックし、集計レポートが正しく設定されているかを確認します。 ツールを使う ](/ja/tools/dmarc-checker/)[ 新着 DMARCレポートアナライザー DMARC集計レポート（XMLまたは.gz）をドロップすると、送信者、合格率、アライメント、レコードごとの詳細を即座に確認できます。お使いのブラウザ内で解析されます。 ツールを使う ](/ja/tools/dmarc-report-analyzer/)[ DKIMレコードルックアップ 50以上のセレクタにわたってDKIMレコードを自動検出。SendGrid、Google Workspace、Microsoft 365、そして100以上のプロバイダーを特定するか、特定のセレクタをルックアップします。 ツールを使う ](/ja/tools/dkim-lookup/)[ BIMIチェッカー 任意のドメインのBIMIレコードをチェックし、ブランドロゴをプレビューし、VMC証明書のステータスを検証します。 ツールを使う ](/ja/tools/bimi-checker/)[ MTA-STSチェッカー MTA-STSのDNSレコードとポリシーファイルを検証。TLS強制モード、許可されたMXホスト、ポリシーのキャッシュ期間をチェックします。 ツールを使う ](/ja/tools/mta-sts-checker/)[ 新着 SPFレコードジェネレーター 有効なSPFレコードを60秒で構築。メールプロバイダーを選び、カスタムIPを追加し、ポリシーを選択して、その結果をDNSにコピーできます。 ツールを使う ](/ja/tools/spf-record-generator/)[ SPFレコードルックアップ 任意のドメインのSPFレコードをライブのDNSからルックアップ。生のレコードを表示し、ネストしたincludeを展開し、ルックアップを数えます。 ツールを使う ](/ja/tools/spf-record-lookup/)[ SPFバリデーター 任意のSPFレコードを、構文エラー、DNSルックアップ違反、voidルックアップ、そしてRFC 7208への完全な準拠について検証します。 ツールを使う ](/ja/tools/spf-validator/)[ SPF用語集 SPFメカニズム、修飾子、モディファイアのリファレンスガイド。ip4、include、redirect、allなどを理解できます。 ツールを使う ](/ja/spf-yogoshu/)[ 新着 メールヘッダーアナライザー 生のメールヘッダーを貼り付けると、ホップごとの時間遅延を含む完全な配信経路と、SPF、DKIM、DMARCの結果を即座に確認できます。Mailflow Monitoringでホストされています。 ツールを使う ](https://mailflowmonitoring.com/tools/email-header-analyzer/?utm%5Fsource=autospf&utm%5Fmedium=tools%5Fdirectory) プロトコルリファレンス ## これらのツールがチェックする内容 SPF TXT @ domain どのサーバーがあなたのドメインとしてメールを送信できるか DMARC TXT @ \_dmarc.domain SPFまたはDKIMが失敗したときにどうするか DKIM TXT @ selector.\_domainkey.domain 暗号によるメール署名の検証 BIMI TXT @ default.\_bimi.domain メールクライアントでのブランドロゴ表示 MTA-STS TXT @ \_mta-sts.domain + policy file 受信メールにTLS暗号化を強制 TLS-RPT TXT @ \_smtp.\_tls.domain TLS接続の失敗を報告 ## DNSルックアップが多すぎますか？ AutoSPFは、あなたのSPFレコードを自動的にフラット化し、10ルックアップ上限内に保ちます。セットアップは60秒で完了します。 [プランと料金を見る→](/ja/ryokin/) Rated 5/5 on G2 · Trusted since 2018 ## 2,000社以上のビジネスに信頼されています ### "Helped us go beyond capacity" > AutoSPF did exactly as described, it helped us get past our 10 lookup limit. Afterwards, we hit another limit regarding overall capacity and when contacted, they quickly provided us with a new solution to eliminate capacity issues entirely going forward, so now we can add as many SPF records as needed. They also provided us with a personalized support video explaining their new method in its entirety using our instance as the example. VU Verified User Financial Services · Mid-Market (51-1000 emp.) ### "Great service and great support" > AutoSPF was easy to initially set up on our own and a great cost effective entry into spf flattening. Needed our first support assistance today and got great response including a video demonstrating the issue I was trying to solve, a quick fix, and more detailed followup. GF Greg F. Mid-Market (51-1000 emp.) ### "Robust and useful product with incredible support" > AutoSPF is a simple tool to solve a significant problem. It does it so very well without any issues. Additionally, the support is very professional and goes above and beyond to help resolve any email-related issues for their customers. VU Verified User Insurance · Mid-Market (51-1000 emp.) [Read our reviews on G2 ](https://www.g2.com/products/autospf/reviews) ```json {"@context":"https://schema.org","@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com","logo":{"@type":"ImageObject","url":"https://autospf.com/images/autospf-logo.png"},"description":"Automatic SPF flattening and email authentication management. 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Resolve SPF lookup limits, flatten SPF records, and maintain email deliverability across all your domains.","parentOrganization":{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138883901","name":"DuoCircle LLC","url":"https://www.duocircle.com","sameAs":["https://www.wikidata.org/wiki/Q138883901","https://www.crunchbase.com/organization/duocircle-llc","https://www.linkedin.com/company/duocircle","https://github.com/duocircle"],"subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]}}} ``` ```json {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"これらのメールセキュリティツールは無料ですか？","acceptedAnswer":{"@type":"Answer","text":"はい。このページのDNSルックアップおよび検証ツールはすべて完全に無料で、アカウントは不要です。任意のドメインのSPF、DMARC、BIMI、MTA-STS、TLS-RPTレコードを即座にチェックできます。"}},{"@type":"Question","name":"ドメイン認証チェッカーとは何ですか？","acceptedAnswer":{"@type":"Answer","text":"ドメイン認証チェッカーは、任意のドメインの5つのメール認証プロトコル（SPF、DMARC、BIMI、MTA-STS、TLS-RPT）すべてを1回のルックアップでテストします。総合スコアと、各プロトコルごとの具体的な洞察を提供します。"}},{"@type":"Question","name":"SPFレコードチェッカーはどのように機能しますか？","acceptedAnswer":{"@type":"Answer","text":"SPFチェッカーは、あなたのドメインのSPF TXTレコードを取得し、すべてのincludeメカニズムを再帰的に解決し、DNSルックアップをRFC 7208の上限である10に照らして数え、あなたのSPFレコードがどのように構成されているかを正確に示す視覚的なツリーを構築します。"}}]} ``` ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://autospf.com/"},{"@type":"ListItem","position":2,"name":"ツール","item":"https://autospf.com/ja/tools/"}]} ``` ```json {"@context":"https://schema.org","@type":"Product","name":"AutoSPF","url":"https://autospf.com","aggregateRating":{"@type":"AggregateRating","ratingValue":5,"reviewCount":21,"bestRating":5,"worstRating":1},"review":[{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":5,"bestRating":5},"author":{"@type":"Person","name":"Verified User","jobTitle":"Financial Services"},"datePublished":"2025-07-31","reviewBody":"AutoSPF did exactly as described, it helped us get past our 10 lookup limit. Afterwards, we hit another limit regarding overall capacity and when contacted, they quickly provided us with a new solution to eliminate capacity issues entirely going forward, so now we can add as many SPF records as needed. They also provided us with a personalized support video explaining their new method in its entirety using our instance as the example.","name":"Helped us go beyond capacity","publisher":{"@type":"Organization","name":"G2","url":"https://www.g2.com"}},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":5,"bestRating":5},"author":{"@type":"Person","name":"Greg F."},"datePublished":"2023-07-26","reviewBody":"AutoSPF was easy to initially set up on our own and a great cost effective entry into spf flattening. Needed our first support assistance today and got great response including a video demonstrating the issue I was trying to solve, a quick fix, and more detailed followup.","name":"Great service and great support","publisher":{"@type":"Organization","name":"G2","url":"https://www.g2.com"}},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":5,"bestRating":5},"author":{"@type":"Person","name":"Verified User","jobTitle":"Insurance"},"datePublished":"2022-01-12","reviewBody":"AutoSPF is a simple tool to solve a significant problem. It does it so very well without any issues. Additionally, the support is very professional and goes above and beyond to help resolve any email-related issues for their customers.","name":"Robust and useful product with incredible support","publisher":{"@type":"Organization","name":"G2","url":"https://www.g2.com"}}]} ```