{"id":11327,"date":"2025-08-27T05:08:35","date_gmt":"2025-08-27T05:08:35","guid":{"rendered":"https:\/\/rakkoserver.com\/plus\/?p=11327"},"modified":"2026-01-20T15:32:45","modified_gmt":"2026-01-20T06:32:45","slug":"tool-spf-checker","status":"publish","type":"post","link":"https:\/\/rakkoserver.com\/plus\/tool-spf-checker\/","title":{"rendered":"SPF\u30ec\u30b3\u30fc\u30c9\u78ba\u8a8d\u30c4\u30fc\u30eb"},"content":{"rendered":"\n<div id=\"spf-checker-tool\">\n    <style>\n        #spf-checker-tool {\n            max-width: 800px;\n            margin: 0 auto;\n            padding: 20px;\n            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;\n            background: #fff;\n            border: 1px solid #ddd;\n            border-radius: 8px;\n        }\n\n        #spf-checker-tool h2 {\n            margin-top: 0;\n            color: #333;\n            border-bottom: 2px solid #007cba;\n            padding-bottom: 10px;\n        }\n\n        .spf-form-group {\n            margin-bottom: 20px;\n        }\n\n        .spf-form-group label {\n            display: block;\n            margin-bottom: 5px;\n            font-weight: 600;\n            color: #333;\n        }\n\n        .spf-form-group input {\n            width: 100%;\n            padding: 12px;\n            border: 1px solid #ccc;\n            border-radius: 4px;\n            font-size: 16px;\n            box-sizing: border-box;\n        }\n\n        .spf-form-group input:focus {\n            outline: none;\n            border-color: #007cba;\n            box-shadow: 0 0 0 2px rgba(0, 124, 186, 0.1);\n        }\n\n        .spf-form-group small {\n            display: block;\n            margin-top: 5px;\n            color: #666;\n        }\n\n        .spf-btn {\n            background-color: #007cba;\n            color: white;\n            padding: 12px 24px;\n            border: none;\n            border-radius: 4px;\n            font-size: 16px;\n            cursor: pointer;\n            transition: background-color 0.2s;\n        }\n\n        .spf-btn:hover {\n            background-color: #005a87;\n        }\n\n        .spf-btn:disabled {\n            background-color: #ccc;\n            cursor: not-allowed;\n        }\n\n        .spf-results {\n            margin-top: 30px;\n            padding: 20px;\n            background: #f9f9f9;\n            border: 1px solid #e0e0e0;\n            border-radius: 4px;\n            display: none;\n        }\n\n        .spf-results h3 {\n            margin-top: 0;\n            color: #333;\n        }\n\n        .spf-results.success {\n            border-left: 4px solid #46b450;\n        }\n\n        .spf-results.error {\n            border-left: 4px solid #dc3232;\n        }\n\n        .spf-results.warning {\n            border-left: 4px solid #f0ad4e;\n        }\n\n        .spf-record {\n            background: white;\n            padding: 15px;\n            margin-bottom: 15px;\n            border: 1px solid #ddd;\n            border-radius: 4px;\n        }\n\n        .spf-record-header {\n            margin-bottom: 10px;\n            font-weight: 600;\n            color: #007cba;\n        }\n\n        .spf-record-content {\n            font-family: monospace;\n            background: #f5f5f5;\n            padding: 8px 12px;\n            border-radius: 3px;\n            word-break: break-all;\n            font-size: 14px;\n        }\n\n        .spf-loading {\n            text-align: center;\n            padding: 20px;\n            color: #666;\n        }\n\n        .spf-query-info {\n            margin-bottom: 15px;\n            padding: 10px;\n            background: #e9f7fd;\n            border-radius: 4px;\n            font-size: 14px;\n        }\n\n        \/* CTA\u30e9\u30c3\u30d1\u30fc *\/\n        .spf-cta-wrapper {\n            display: none !important;\n            margin-left: 8px !important;\n            vertical-align: middle !important;\n        }\n\n        .spf-cta-wrapper.spf-cta-wrapper--show {\n            display: inline-block !important;\n        }\n\n        \/* CTA\u30e9\u30d9\u30eb(\u30aa\u30ec\u30f3\u30b8\u30fb\u30dc\u30bf\u30f3\u5185\u306e\u5de6\u5074) *\/\n        .spf-cta-label {\n            display: inline-block !important;\n            padding: 1px 4px !important;\n            background: #ff6b35 !important;\n            color: #fff !important;\n            font-size: 9px !important;\n            font-weight: 600 !important;\n            border-radius: 2px !important;\n            white-space: nowrap !important;\n            margin-right: 6px !important;\n            vertical-align: middle !important;\n        }\n\n        \/* CTA\u30dc\u30bf\u30f3(\u5c0f\u3055\u3081\u30fb\u30a4\u30f3\u30e9\u30a4\u30f3\u30fb\u9ed2) *\/\n        .spf-cta-btn {\n            display: inline-block !important;\n            padding: 4px 10px !important;\n            background: #333 !important;\n            color: #fff !important;\n            font-size: 11px !important;\n            font-weight: 500 !important;\n            text-decoration: none !important;\n            border-radius: 3px !important;\n            white-space: nowrap !important;\n            transition: all 0.2s ease !important;\n        }\n\n        .spf-cta-btn:hover {\n            background: #555 !important;\n        }\n\n        .spf-cta-domain {\n            font-weight: 700 !important;\n        }\n\n        \/* \u30ec\u30b9\u30dd\u30f3\u30b7\u30d6\u5bfe\u5fdc *\/\n        @media (max-width: 480px) {\n            #spf-checker-tool {\n                margin: 0;\n                border-radius: 0;\n                border-left: none;\n                border-right: none;\n            }\n            \n            .spf-form-group input, .spf-btn {\n                font-size: 16px; \/* Prevent zoom on iOS *\/\n            }\n\n            .spf-cta-wrapper {\n                display: block !important;\n                margin-left: 0 !important;\n                margin-top: 6px !important;\n            }\n\n            .spf-cta-wrapper.spf-cta-wrapper--show {\n                display: block !important;\n            }\n\n            .spf-cta-btn {\n                white-space: normal !important;\n                max-width: 100% !important;\n                word-break: break-word !important;\n                display: inline-block !important;\n            }\n\n            .spf-cta-label {\n                display: inline-block !important;\n            }\n        }\n    <\/style>\n    <div class=\"spf-form-group\">\n        <label for=\"spf-domain\">\u30c9\u30e1\u30a4\u30f3\u540d<\/label>\n        <input type=\"text\" id=\"spf-domain\" placeholder=\"example.com\">\n    <\/div>\n\n    <div class=\"spf-form-group\">\n        <label for=\"spf-dns-server\">DNS\u30b5\u30fc\u30d0\u30fc<\/label>\n        <input type=\"text\" id=\"spf-dns-server\" value=\"8.8.8.8\">\n    <\/div>\n\n    <button class=\"spf-btn\" onclick=\"checkSpfRecords()\">SPF\u30ec\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d<\/button>\n\n    <div id=\"spf-results\" class=\"spf-results\"><\/div>\n\n<\/div>\n<script>\n\n<\/script>\n\n\n\n<!-- \u5171\u901aCSS\uff081\u56de\u3060\u3051\u8aad\u307f\u8fbc\u3081\u3070OK\uff09 -->\n<style>\n  .rs-related-tools {\n    background: transparent;\n    color: #000;\n    padding: 10px 0;\n    font-size: 14px;\n    line-height: 1.6;\n    display: flex;\n    flex-wrap: wrap;\n    gap: 8px 12px;\n    align-items: center;\n    margin: 16px 0;\n  }\n  .rs-related-tools__label {\n    border: 1px solid #000;\n    padding: 2px 6px;\n    border-radius: 4px;\n    font-weight: 600;\n    white-space: nowrap;\n  }\n  .rs-related-tools a {\n    color: #0066cc; \/* \u6a19\u6e96\u30ea\u30f3\u30af\u8272 *\/\n    text-decoration: none;\n    white-space: nowrap;\n  }\n  .rs-related-tools a:hover,\n  .rs-related-tools a:focus {\n    text-decoration: underline;\n  }\n<\/style>\n<div class=\"rs-related-tools\">\n  <span class=\"rs-related-tools__label\">\u95a2\u9023\u30c4\u30fc\u30eb<\/span>\n  <a href=\"https:\/\/rakkoserver.com\/plus\/tool-nslookup-dig\/\">nslookup \/ dig<\/a>\n  <a href=\"https:\/\/rakkoserver.com\/plus\/tool-txt-checker\/\">TXT<\/a>\n  <a href=\"https:\/\/rakkoserver.com\/plus\/tool-dkim-lookup\/\">DKIM<\/a>\n  <a href=\"http:\/\/rakkoserver.com\/plus\/tool-dmarc-check\/\">DMARC<\/a>\n  <a href=\"https:\/\/rakkoserver.com\/plus\/tool-mx-checker\/\">MX<\/a>\n  <a href=\"https:\/\/rakkoserver.com\/plus\/tool-ptr-lookup\/\">PTR<\/a>\n<\/div>\n\n\n\n<p>\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u5165\u529b\u3059\u308b\u3060\u3051\u3067\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bSPF\u30ec\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3067\u304d\u308b\u7121\u6599\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u3084\u3001\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u5411\u4e0a\u306e\u305f\u3081\u306b\u3054\u6d3b\u7528\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-0\">SPF\u30ec\u30b3\u30fc\u30c9\u3068\u306f\uff1f<\/h2>\n\n\n\n<p>SPF (Sender Policy Framework) \u30ec\u30b3\u30fc\u30c9\u306f\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u5dee\u51fa\u4eba\u3068\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3092\u8a31\u53ef\u3055\u308c\u305f\u3001<strong>\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc<\/strong>\u3092\u5ba3\u8a00\u3059\u308b\u305f\u3081\u306eDNS\u8a2d\u5b9a\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u3053\u306eSPF\u30ec\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u5c4a\u3044\u305f\u30e1\u30fc\u30eb\u304c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3067\u306f\u306a\u304f\u3001\u8a31\u53ef\u3055\u308c\u305f\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u672c\u7269\u3067\u3042\u308b\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<br><strong><span class=\"keiko_yellow\">SPF\u30ec\u30b3\u30fc\u30c9\u3092\u6b63\u3057\u304f\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001\u81ea\u793e\u30c9\u30e1\u30a4\u30f3\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u3001\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u304c\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u307e\u3059\u3002<\/span><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-1\">\u3053\u306e\u30c4\u30fc\u30eb\u3067\u78ba\u8a8d\u3067\u304d\u308b\u3053\u3068<\/h2>\n\n\n\n<p>\u6307\u5b9a\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u306eDNS\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308bSPF\u30ec\u30b3\u30fc\u30c9\u306e\u3001\u5177\u4f53\u7684\u306a\u8a2d\u5b9a\u5185\u5bb9\uff08\u6587\u5b57\u5217\uff09\u3092\u305d\u306e\u307e\u307e\u8868\u793a\u3057\u307e\u3059\u3002 \uff08\u4f8b: <code>\"v=spf1 include:_spf.google.com ~all\"<\/code>\uff09<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u3053\u3093\u306a\u6642\u306b\u3054\u6d3b\u7528\u304f\u3060\u3055\u3044<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306a\u30e1\u30fc\u30eb\u8a2d\u5b9a\u3092\u78ba\u8a8d\u3057\u305f\u3044\u3068\u304d<\/strong> <br>\u3054\u81ea\u8eab\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u3001SPF\u30ec\u30b3\u30fc\u30c9\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30e1\u30fc\u30eb\u304c\u76f8\u624b\u306b\u5c4a\u304b\u306a\u3044\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u306a\u308b\u5834\u5408\u306b<\/strong> <br>\u9001\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306e\u5230\u9054\u7387\u304c\u4f4e\u3044\u5834\u5408\u3001\u539f\u56e0\u8abf\u67fb\u306e\u4e00\u3064\u3068\u3057\u3066SPF\u30ec\u30b3\u30fc\u30c9\u306e\u8a2d\u5b9a\u306b\u8aa4\u308a\u304c\u306a\u3044\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u65b0\u3057\u3044\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3092\u5c0e\u5165\u3057\u305f\u5f8c\u306b<\/strong> <br>Google Workspace, Microsoft 365, SendGrid, Mailchimp\u306a\u3069\u306e\u5916\u90e8\u30b5\u30fc\u30d3\u30b9\u304b\u3089\u30e1\u30fc\u30eb\u3092\u914d\u4fe1\u3059\u308b\u969b\u3001\u6307\u5b9a\u3055\u308c\u305f\u8a2d\u5b9a\u304cSPF\u30ec\u30b3\u30fc\u30c9\u306b\u6b63\u3057\u304f\u8ffd\u52a0\u30fb\u53cd\u6620\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3057\u305f\u3044\u3068\u304d<\/strong> <br>\u81ea\u793e\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u60aa\u7528\u3057\u305f\u300c\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u3092\u9632\u6b62\u3059\u308b\u305f\u3081\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u304c\u9069\u5207\u306b\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u30c9\u30e1\u30a4\u30f3\u540d DNS\u30b5\u30fc\u30d0\u30fc SPF\u30ec\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d \u95a2\u9023\u30c4\u30fc\u30eb nslookup \/ dig TXT DKIM DMARC MX PTR \u30c9\u30e1\u30a4\u30f3\u540d\u3092\u5165\u529b\u3059\u308b\u3060\u3051\u3067\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bSPF\u30ec\u30b3\u30fc\u30c9\u3092\u78ba\u8a8d\u3067\u304d\u308b\u7121 &#8230; <\/p>\n","protected":false},"author":4,"featured_media":11331,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,25,8,27],"tags":[],"class_list":{"0":"post-11327","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-dns","8":"category-security","9":"category-tool","10":"category-mail","11":"entry"},"_links":{"self":[{"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/posts\/11327","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/comments?post=11327"}],"version-history":[{"count":10,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/posts\/11327\/revisions"}],"predecessor-version":[{"id":12497,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/posts\/11327\/revisions\/12497"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/media\/11331"}],"wp:attachment":[{"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/media?parent=11327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/categories?post=11327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rakkoserver.com\/plus\/wp-json\/wp\/v2\/tags?post=11327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}