{"id":71151,"date":"2025-11-29T20:56:53","date_gmt":"2025-11-29T11:56:53","guid":{"rendered":"https:\/\/webst8.com\/blog\/?p=71151"},"modified":"2025-12-24T16:16:27","modified_gmt":"2025-12-24T07:16:27","slug":"gmail-transfer-guaideline","status":"publish","type":"post","link":"https:\/\/webst8.com\/blog\/gmail-transfer-guaideline\/","title":{"rendered":"Gmail\u306b\u5c4a\u304b\u306a\u3044\uff1f\u9001\u4fe1\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3068SPF\/DKIM\/DMARC\u3092\u89e3\u8aac"},"content":{"rendered":"<p>\u300c\u6700\u8fd1\u3001\u304a\u5ba2\u69d8\u304b\u3089\u300e\u30e1\u30fc\u30eb\u304c\u5c4a\u3044\u3066\u3044\u306a\u3044\u300f\u3068\u8a00\u308f\u308c\u308b\u3053\u3068\u304c\u5897\u3048\u305f\u300d<\/p>\n<p>\u300c\u30e1\u30eb\u30de\u30ac\u306e\u958b\u5c01\u7387\u304c\u6025\u306b\u4e0b\u304c\u3063\u305f\u300d<\/p>\n<p>2024\u5e74\u4ee5\u964d\u3001Gmail\u306f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3084\u30b9\u30d1\u30e0\u5bfe\u7b56\u3092\u5927\u5e45\u306b\u5f37\u5316\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3068\u3001<b>\u6b63\u5f53\u306a\u30d3\u30b8\u30cd\u30b9\u30e1\u30fc\u30eb\u3067\u3042\u3063\u3066\u3082\u8ff7\u60d1\u30e1\u30fc\u30eb\u6271\u3044\u3055\u308c\u305f\u308a\u3001\u62d2\u5426\u3055\u308c\u305f\u308a\u3059\u308b<\/b>\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u30012024\u5e74\u5b9f\u65bd\u3055\u308c\u305fGmail\u3078\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u8aac\u660e\u3068\u300c\u30e1\u30fc\u30eb\u8a8d\u8a3c\uff08SPF\u30fbDKIM\u30fbDMARC\uff09\u300d\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-71141\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline.png\" alt=\"\" width=\"1200\" height=\"669\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline-1024x571.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>&nbsp;<br \/>\n<div class=\"webst-sns-follow-container\">\n<div class=\"webst-sns-follow-title\">SNS\u30d5\u30a9\u30ed\u30fc\u3088\u308d\u3057\u304f\u304a\u9858\u3044\u3057\u307e\u3059\uff01<br \/>\n<br \/><span style=\"font-size:11px\">\u65b0\u3057\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u3084\u3001\u3088\u308a\u8a73\u7d30\u306a\u89e3\u8aac\u3092\u52d5\u753b\u3084\u30b7\u30e7\u30fc\u30c8\u52d5\u753b\u3067\u304a\u5c4a\u3051\u3057\u3066\u3044\u307e\u3059\u3002\u65e5\u3005\u306e\u60c5\u5831\u53ce\u96c6\u306b\u304a\u5f79\u7acb\u3066\u304f\u3060\u3055\u3044\u3002<\/span><\/div>\n<div class=\"webst-sns-follow-row\">\n<a href=\"https:\/\/www.youtube.com\/@webst8356\" class=\"webst-sns-button webst-sns-youtube\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-youtube.png\" alt=\"\" width=\"737\" height=\"289\" class=\"alignnone size-full wp-image-70744\" \/><\/a>\n<\/div>\n<p><!-- \n\n<div class=\"webst-sns-follow-row\">\n<a href=\"https:\/\/www.instagram.com\/webst8_com\" class=\"webst-sns-button webst-sns-instagram\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-instagram.png\" alt=\"\" width=\"250\" height=\"315\" class=\"alignnone size-full wp-image-70741\" \/><\/a>\n<a href=\"https:\/\/www.tiktok.com\/@webst8_com\" class=\"webst-sns-button webst-sns-tiktok\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-tiktok.png\" alt=\"\" width=\"214\" height=\"305\" class=\"alignnone size-full wp-image-70742\" \/><\/a>\n<a href=\"https:\/\/x.com\/mattsunkei\" class=\"webst-sns-button webst-sns-twitter-x\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/09\/sns-logo-x.png\" alt=\"\" width=\"219\" height=\"301\" class=\"alignnone size-full wp-image-70743\" \/><\/a>\n<\/div>\n\n -->\n<\/div>\n<br \/>\n&nbsp;<\/p>\n\n<p>&nbsp;<\/p>\n<h2>Gmail\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306e\u5177\u4f53\u7684\u306a\u8981\u6c42\u4e8b\u9805<\/h2>\n<p>2024\u5e74\u304b\u3089Gmail\u306f\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u8a50\u6b3a\u3084\u8ff7\u60d1\u30e1\u30fc\u30eb\u304b\u3089\u5b88\u308b\u305f\u3081\u3001\u9001\u4fe1\u8005\u306b\u5bfe\u3057\u3066\u300c\u8eab\u5206\u8a3c\u660e(SPF\u30fbDKIM\u30fbDMARC)\u300d\u3092\u53b3\u683c\u306b\u6c42\u3081\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-guideline.png\" alt=\"\" width=\"1200\" height=\"635\" class=\"alignnone size-full wp-image-71170\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-guideline.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-guideline-1024x542.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\n<a href=\"https:\/\/support.google.com\/a\/answer\/81126?hl=ja\" target=\"_blank\">\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3 | Google Workspace\u306e\u7ba1\u7406\u8005\u30d8\u30eb\u30d7<\/a><br \/>\n\u3053\u306e\u5f71\u97ff\u30672024\u5e74\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u304f\u306a\u3063\u305f\u3063\u3066\u7d4c\u9a13\u3042\u308b\u4eba\u3082\u7d50\u69cb\u3044\u3089\u3063\u3057\u3083\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>&nbsp;<\/p>\n<div class=\"list-frame primary\">\n<p class=\"list-frame-p\">Gmail\u300c\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u300d\u306e\u8981\u70b9<\/p>\n<ul>\n<li><strong>\u76ee\u7684\uff1a<\/strong> \u306a\u308a\u3059\u307e\u3057\u30fb\u8ff7\u60d1\u30e1\u30fc\u30eb\u306e\u64b2\u6ec5\uff08\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u5074\u3078\u9001\u4fe1\u8005\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u306e\u5c0e\u5165\u3092\u8981\u6c42)<\/li>\n<li><strong>\u5bfe\u8c61\uff1a<\/strong> Gmail\u30a2\u30ab\u30a6\u30f3\u30c8\u5b9b\u306b\u30e1\u30fc\u30eb\u3092\u9001\u308b<strong>\u3059\u3079\u3066\u306e\u9001\u4fe1\u8005\u306fSPF(\u8eab\u5143\u78ba\u8a8d)\u307e\u305f\u306fDKIM(\u6539\u3056\u3093\u691c\u77e5)\u306e\u4ed5\u7d44\u307f\u3092\u5c0e\u5165\u30fbPASS\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308b<\/strong><\/li>\n<li><strong>\u7f70\u5247\uff1a<\/strong> \u30eb\u30fc\u30eb\u672a\u5bfe\u5fdc\u306e\u30e1\u30fc\u30eb\u306f<strong>\u62d2\u5426\uff08\u30d6\u30ed\u30c3\u30af\uff09\u307e\u305f\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb<\/strong>\u6271\u3044<\/li>\n<\/ul>\n<\/div>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-71141\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline.png\" alt=\"\" width=\"1200\" height=\"669\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline-1024x571.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>&nbsp;<br \/>\n\u4eca\u73fe\u5728\u3082SPF\u3001DKIM\u306e\u3069\u3061\u3089\u3082\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\uff08\u8a8d\u8a3cNG\uff09\u306e\u5834\u5408\u3001Gmail\u5074\u3067\u30e1\u30fc\u30eb\u304c\u5f3e\u304b\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u73fe\u5728\u5c4a\u3044\u3066\u3044\u308b\u30e1\u30fc\u30eb\u306f\u9001\u4fe1\u8005\u5074\uff08\u30d7\u30ed\u30d0\u30a4\u30c0\u5074\uff09\u3067\u57fa\u672c\u7684\u306b\u6700\u4f4e\u9650SPF\u304bDKIM\u306e\u8a2d\u5b9a\u304c\u3055\u308c\u3066\u3044\u308b\u30b1\u30fc\u30b9\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u300c1\u65e55,000\u901a\u4ee5\u4e0a\u9001\u4fe1\u3059\u308b\u9001\u4fe1\u8005\u3055\u3089\u306bSPF\u30fbDKIM\u306b\u52a0\u3048\u3066DMARC\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3082\u5b9f\u88c5\u3057\u3066\u3044\u306a\u3044\u3068\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3082Gmail\u5074\u3067\u3046\u307e\u304f\u53d7\u4fe1\u3057\u3066\u304f\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u53b3\u5bc6\u306b\u306f\u3053\u306e\u307b\u304b\u3001\u5168\u3066\u306e\u9001\u4fe1\u8005\u306f\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u3092 <b>0.3%\u672a\u6e80<\/b>\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u8981\u4ef6\u306b\u5165\u3063\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u30011\u65e55,000\u901a\u4ee5\u4e0a\u9001\u308b\u4e00\u62ec\u9001\u4fe1\u8005\u306f\u3055\u3089\u306b\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30e1\u30fc\u30eb\u306b<b>\u30ef\u30f3\u30af\u30ea\u30c3\u30af\u3067\u306e\u767b\u9332\u89e3\u9664\u6a5f\u80fd<\/b>\uff08List-Unsubscribe\uff09\u306e\u5b9f\u88c5\u304c\u5fc5\u9808\u306a\u3069\u306e\u8981\u4ef6\u3092\u8a2d\u3051\u3066\u3044\u307e\u3059\u304c\u3053\u3053\u3067\u306f\u5272\u611b\u3057\u307e\u3059\u3002<br \/>\n&nbsp;<br \/>\n<span class=\"bg-accent\">\u95a2\u9023<\/span><a href=\"https:\/\/support.google.com\/a\/answer\/81126?hl=ja\" target=\"_blank\" rel=\"noopener\">\u30e1\u30fc\u30eb\u9001\u4fe1\u8005\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3 | Google Workspace\u306e\u7ba1\u7406\u8005\u30d8\u30eb\u30d7<\/a><\/p>\n<p>&nbsp;<\/p>\n<h2>SPF\u30fbDKIM\u30fbDMARC\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u3092\u89e3\u8aac<\/h2>\n<p>\u3053\u3053\u304b\u3089\u306f\u3001SPF\u30fbDKIM\u30fbDMARC\u306e\u4ed5\u7d44\u307f\u3068\u8a2d\u5b9a\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<span class=\"youtube-insert-link\">\u203b<a href=\"https:\/\/www.youtube.com\/watch?v=yS-qVxYb_Xw&#038;t=624s\" target=\"_blank\">\u52d5\u753b\u672c\u7de8\u306e10:24\u301c<\/a>\u3067\u89e3\u8aac<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><strong>SPF<\/strong>(Sender Policy Framework\uff09<\/td>\n<td><strong>\u9001\u4fe1\u30e1\u30fc\u30eb\u304c\u3001\u4e8b\u524d\u306b\u8a31\u53ef\u3055\u308c\u305f\uff08DNS\u30ec\u30b3\u30fc\u30c9\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\uff09\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u3089\u308c\u3066\u3044\u307e\u3059\u3088\u3001\u3068\u3044\u3046\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u3002<br \/>\n<\/strong>\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u3068\u306f\u7121\u95a2\u4fc2\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3067\u306a\u3044\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u4ed5\u7d44\u307f<\/td>\n<\/tr>\n<tr>\n<td><strong>DKIM(<\/strong>DomainKeys Identified Mail\uff09<\/td>\n<td><strong>\u30e1\u30fc\u30eb\u304c\u9001\u4fe1\u9014\u4e2d\u3067\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\uff08\u96fb\u5b50\u7f72\u540d\uff09<br \/>\n<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>DMARC(<\/strong>Domain-based Message Authentication, Reporting, and Conformance<\/td>\n<td>\u524d\u8ff0\u306eSPF\u3068DKIM\u306e\u3069\u3061\u3089\u304b\u3001\u307e\u305f\u306f\u4e21\u65b9\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3001\u53d7\u4fe1\u5074\uff08Gmail\uff09\u304c\u3069\u3046\u6271\u3046\u3079\u304d\u304b\u3092\u3001\u9001\u4fe1\u5074\u304c\u3042\u3089\u304b\u3058\u3081\u6307\u793a\u3057\u3066\u304a\u304f\u4ed5\u7d44\u307f<br \/>\n\uff08\u305d\u306e\u307e\u307e\u53d7\u4fe1\u3057\u3066\/\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u632f\u308a\u5206\u3051\u3066\/\u5ec3\u68c4\u3057\u3066\u304b\u3089\u9078\u629e\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/yS-qVxYb_Xw?si=YPnp7BNU6mzZyTVP&amp;start=623\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><br \/>\n&nbsp;<\/p>\n<h3>\u8eab\u5143\u4fdd\u8a3c\u306e\u4ed5\u7d44\u307fSPF\u30e1\u30fc\u30eb\u8a8d\u8a3c<\/h3>\n<p>\u307e\u305a1\u3064\u76ee\u3001SPF(SPF = Sender Policy Framework\uff09\u3067\u3059\u3002<span class=\"youtube-insert-link\">\u203b<a href=\"https:\/\/www.youtube.com\/watch?v=yS-qVxYb_Xw&#038;t=630s\" target=\"_blank\">\u52d5\u753b\u672c\u7de8\u306e10:30\u301c<\/a>\u3067\u89e3\u8aac<\/span><\/p>\n<p>\u3053\u308c\u306f\u3001\u300c<strong>\u3053\u306e\u9001\u4fe1\u30e1\u30fc\u30eb\u304c\u3001\u4e8b\u524d\u306b\u8a31\u53ef\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u3089\u308c\u3066\u3044\u307e\u3059\u3088<\/strong>\u300d\u3068\u3044\u3046\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u90f5\u4fbf\u3067\u306e\u4f8b\u3048\u308b\u3068\u3001\u300c\u5dee\u51fa\u4eba\u306e\u4f4f\u6240\u300d\u304c\u6b63\u3057\u3044\u304b\u78ba\u8a8d\u3059\u308b\u30ea\u30b9\u30c8\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-71135\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-spf.png\" alt=\"\" width=\"1200\" height=\"676\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-spf.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-spf-1024x577.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>\u5177\u4f53\u7684\u306b\u3044\u3046\u3068\u3001DNS\u306e\u30ec\u30b3\u30fc\u30c9\u306b\u300c<strong>\u79c1\uff08webst8.biz\uff09\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f\u3001\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f8b\uff1a123.45.67.89\uff09\u306e\u30b5\u30fc\u30d0\u30fc(\u90e1)\u304b\u3089\u3057\u304b\u9001\u308a\u307e\u305b\u3093<\/strong>\u300d\u3068\u66f8\u304d\u8fbc\u3093\u3067\u304a\u304d\u307e\u3059\u3002<\/p>\n<p>IP\u30a2\u30c9\u30ec\u30b9\u3067\u6307\u5b9a\u3059\u308b\u65b9\u6cd5\u3082\u3042\u308c\u3070\u3001include\u3092\u4f7f\u3063\u3066\u6307\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u914d\u4e0b\u304b\u3089\u9001\u4fe1\u3055\u308c\u308b\u3068\u3044\u3046\u3088\u3046\u306a\u6307\u5b9a\u306e\u4ed5\u65b9\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u6307\u5b9a\u306e\u4ed5\u65b9\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u5404\u30b5\u30fc\u30d0\u30fc\u4f1a\u793e\u306b\u3088\u3063\u3066\u5fae\u5999\u306b\u66f8\u304d\u65b9\u304c\u7570\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002<\/p>\n<div class=\"box-simple\">\u25a0\u30ed\u30ea\u30dd\u30c3\u30d7\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bSPF\u30ec\u30b3\u30fc\u30c9\u306e\u4f8b<br \/>\n<code>webst8.biz text = \"v=spf1 include:_spf.lolipop.jp ~all\"<\/code><br \/>\n&nbsp;<br \/>\n\u25a0\u3055\u304f\u3089\u3067\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bSPF\u30ec\u30b3\u30fc\u30c9\u306e\u4f8b<br \/>\n<code>webst8.biz text = \"v=spf1 a:www12345.sakura.ne.jp mx ~all\"<\/code><br \/>\n&nbsp;<br \/>\n\u25a0\u30a8\u30c3\u30af\u30b9\u30b5\u30fc\u30d0\u30fc\u3067\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\uff09\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bSPF\u30ec\u30b3\u30fc\u30c9\u306e\u4f8b<br \/>\n<code>webst8.biz text = \"v=spf1 +a:sv12345.xserver.jp +a:webst8.com +mx include:spf.sender.xserver.jp ~all<\/code><\/div>\n<p>\u4f8b\u3048\u3070\u3001~all\u306e(~\uff1a\u30c1\u30eb\u30c0)\u306f\u6307\u5b9a\u4ee5\u5916\u306e\u30b5\u30fc\u30d0\u30fc\u4ee5\u5916\u304b\u3089\u306e\u30e1\u30fc\u30eb\u3060\u3063\u305f\u5834\u5408\u306f\u914d\u4fe1\u3067\u304d\u308b\u304c\u602a\u3057\u3044\u3082\u306e\u3068\u3057\u3066\u30de\u30fc\u30af\u3057\u3066\u306d\u3068\u3044\u3046\u610f\u5473\u3067\u3059(SoftFail)\u3002<\/p>\n<p>\u3053\u306e\u30c1\u30eb\u30c0\u3092-all(\u30cf\u30a4\u30d5\u30f3)\u306b\u3059\u308b\u3068\u6307\u5b9a\u3057\u305f\u30b5\u30fc\u30d0\u30fc\u4ee5\u5916\u306f\u8a31\u53ef\u3057\u306a\u3044Fail\u306b\u3057\u3066\u306d\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u591a\u304f\u306e\u30b5\u30fc\u30d0\u30fc(\u30c9\u30e1\u30a4\u30f3)\u3067\u306f\u3001DNS\u30ec\u30b3\u30fc\u30c9\u8a2d\u5b9a\u3092\u81ea\u8eab\u3067\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u304c\u3001\u3061\u3087\u3063\u3068\u3057\u305f\u66f8\u304d\u65b9\u3067\u30df\u30b9\u304c\u8d77\u3053\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u9001\u4fe1\u5143\u306b\u6307\u5b9a\u3057\u3088\u3046\u3068SPF\u30ec\u30b3\u30fc\u30c9\u3092\u8907\u6570\u8a18\u8ff0\u3059\u308b\u3068\u5931\u6557\u3057\u3066\u3044\u3057\u307e\u3044\u307e\u3059\uff08\u4e00\u884c\u3067\u53ce\u3081\u308b\u8a18\u8ff0\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff09\u3002<\/p>\n<p>\u81ea\u8eab\u3067\u30ec\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u30fb\u7de8\u96c6\u3059\u308b\u969b\u306f\u6ce8\u610f\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n&nbsp;<\/p>\n<h3>\u6539\u3056\u3093\u30c1\u30a7\u30c3\u30af\u306e\u4ed5\u7d44\u307fDKIM\u30e1\u30fc\u30eb\u8a8d\u8a3c<\/h3>\n<p>2\u3064\u76ee\u3001DKIM(*KIM = DomainKeys Identified Mail\uff09\u306f\u300c\u30e1\u30fc\u30eb\u304c\u9014\u4e2d\u3067\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u300d\u3092\u78ba\u8a8d\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<span class=\"youtube-insert-link\">\u203b<a href=\"https:\/\/www.youtube.com\/watch?v=yS-qVxYb_Xw&#038;t=665s\" target=\"_blank\">\u52d5\u753b\u672c\u7de8\u306e11:05\u301c<\/a>\u3067\u89e3\u8aac<\/span><\/p>\n<p>\u90f5\u4fbf\u3067\u4f8b\u3048\u308b\u3068\u3001\u73fe\u5b9f\u4e16\u754c\u3067\u8a00\u3046\u3068\u3001\u672a\u958b\u5c01\u30b7\u30fc\u30eb\u304c\u8cbc\u3063\u3066\u3042\u3063\u3066\u4e2d\u8eab\u304c\u5909\u308f\u3063\u3066\u3044\u306a\u3044\u3088\u306d\u3001\u3063\u3066\u3044\u3046\u611f\u3058\u306e\u3082\u306e\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-71132\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-dkim.png\" alt=\"\" width=\"1200\" height=\"668\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-dkim.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-dkim-1024x570.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\n&nbsp;<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u30e1\u30fc\u30eb\u3092\u9001\u308b\u5074\uff08\u30b5\u30fc\u30d0\u30fc\uff09\u304c\u3001\u30e1\u30fc\u30eb\u5185\u5bb9\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3057\u305f\u300c\u96fb\u5b50\u7f72\u540d\u300d\u3092\u30e1\u30fc\u30eb\u306b\u6dfb\u4ed8\u3057\u307e\u3059\u3002<\/p>\n<p>\u53d7\u3051\u53d6\u3063\u305fGmail\u5074\u306f\u3001\u305d\u306e\u7f72\u540d\u3092\u691c\u8a3c\u3057\u3001\u300c\u3046\u3093\u3001\u9014\u4e2d\u3067\u8ab0\u3082\u4e2d\u8eab\u3092\u66f8\u304d\u63db\u3048\u3066\u3044\u306a\u3044\u3057\u3001\u78ba\u304b\u306b\u672c\u4eba\u304c\u9001\u3063\u305f\u3082\u306e\u3060\u306d\u3002OK\u300d\u3068\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e2d\u8eab\u304c\u3059\u308a\u66ff\u3048\u3089\u308c\u3066\u3044\u308c\u3070\u7f72\u540d\u304c\u5408\u81f4\u3057\u306a\u304f\u306a\u308b\u305f\u3081\u3001\u53d7\u4fe1\u5074\u306f\u300c\u3053\u308c\u306f\u6539\u3056\u3093\u3055\u308c\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u300d\u3068\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>SPF\u306fDNS\u30ec\u30b3\u30fc\u30c9\u306b\u6307\u5b9a\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u5b9f\u73fe\u3067\u304d\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001DKIM\u306f\u79d8\u5bc6\u9375\u3068\u516c\u958b\u9375\u3092SMTP\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u751f\u6210\u30fb\u5c0e\u5165\u3057\u3066\u3044\u306a\u3044\u3068DNS\u30ec\u30b3\u30fc\u30c9\u306e\u8a18\u8ff0\u3060\u3051\u3067\u306f\u5b9f\u88c5\u3067\u304d\u307e\u305b\u3093\u3002\u203bDKIM\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30b5\u30fc\u30d0\u30fc\u3067\u3042\u308c\u3070\u3001\u5951\u7d04\u8005\u81ea\u8eab\u3067\u8a2d\u5b9a\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<div class=\"sb-type-drop\">\n\t<div class=\"sb-subtype-a\">\n\t\t<div class=\"sb-speaker\">\n\t\t\t<div class=\"sb-icon\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/plugins\/speech-bubble\/img\/keisuke.jpg\" class=\"sb-icon\">\n\t\t\t<\/div>\n\t\t\t<div class=\"sb-name\"><\/div>\n\t\t<\/div>\n\t\t<div class=\"sb-content\">\n\t\t\t<div class=\"sb-speech-bubble\">\u4eca\u73fe\u5728\u3001SPF\u307e\u305f\u306fDKIM\u306e\u3069\u3061\u3089\u304b\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308c\u3070Gmail\u5074\u3078\u666e\u901a\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u74b0\u5883\u3067\u306f\u3059\u3067\u306b\u5b9f\u88c5\u6e08\u307f\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<h3>\u8a8d\u8a3c\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u306e\u51e6\u7406\u65b9\u6cd5\u3092\u6307\u793a DMARC<\/h3>\n<p>3\u3064\u76ee\u306eDMARC(Domain-based Message Authentication, Reporting, and Conformance\uff09\u306f\u3001\u5148\u307b\u3069\u306eSPF\u3068DKIM\u306b\u5931\u6557\u3057\u305f\uff08\uff1d\u507d\u7269\u306e\u53ef\u80fd\u6027\u304c\u9ad8\u3044\uff09\u30e1\u30fc\u30eb\u3092\u3001\u53d7\u4fe1\u5074\uff08Gmail\uff09\u304c\u3069\u3046\u6271\u3046\u3079\u304d\u304b\u3092\u3001\u9001\u4fe1\u5074\u304c\u3042\u3089\u304b\u3058\u3081\u6307\u793a\u3057\u3066\u304a\u304f\u4ed5\u7d44\u307f\u3067\u3059\u3002<span class=\"youtube-insert-link\">\u203b<a href=\"https:\/\/www.youtube.com\/watch?v=yS-qVxYb_Xw&#038;t=715s\" target=\"_blank\">\u52d5\u753b\u672c\u7de8\u306e11:55\u301c<\/a>\u3067\u89e3\u8aac<\/span><\/p>\n<p>\u300c\u3082\u3057\u30a6\u30c1\uff08webst8.biz\uff09\u3092\u540d\u4e57\u308b\u507d\u7269\u304c\u6765\u305f\u3089\u3001\u3053\u3046\u5bfe\u51e6\u3057\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u3044\u3046\u5ba3\u8a00\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-71133\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-dmarc.png\" alt=\"\" width=\"1200\" height=\"665\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-dmarc.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-dmarc-1024x567.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\n&nbsp;<br \/>\nDMARC\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001Gmail\u5074\u306f\u300c\u507d\u7269\u3092\u3069\u3046\u6271\u3048\u3070\u3044\u3044\u304b\u300d\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u9001\u4fe1\u5074\u306f\u300c\u81ea\u5206\u305f\u3061\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u52dd\u624b\u306b\u4f7f\u3063\u305f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u300d\u304c\u76f8\u624b\u306b\u5c4a\u304f\u306e\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"sb-type-drop\">\n\t<div class=\"sb-subtype-a\">\n\t\t<div class=\"sb-speaker\">\n\t\t\t<div class=\"sb-icon\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/plugins\/speech-bubble\/img\/keisuke.jpg\" class=\"sb-icon\">\n\t\t\t<\/div>\n\t\t\t<div class=\"sb-name\"><\/div>\n\t\t<\/div>\n\t\t<div class=\"sb-content\">\n\t\t\t<div class=\"sb-speech-bubble\">\u3082\u3057\u507d\u7269\u306e\u624b\u7d19\u304c\u5c4a\u3044\u305f\u3089\u3001\u6368\u3066\u3066\u304f\u3060\u3055\u3044\uff08\u3042\u308b\u3044\u306f\u5831\u544a\u3057\u3066\u304f\u3060\u3055\u3044\uff09\u300d\u3068\u3044\u3046\u53d7\u53d6\u4eba\u3078\u306e\u6307\u793a\u66f8\u306e\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u306d\u3002<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<p>DMARC\u306e\u8a2d\u5b9a\u3067\u3001\u79c1\u305f\u3061\u306fGmail\u5074\u306b\u6b21\u306e\u3088\u3046\u306b\u6307\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>none: \u4f55\u3082\u3057\u306a\u3044\u3067\u3001\u3068\u308a\u3042\u3048\u305a\u53d7\u4fe1\u3057\u3066<\/li>\n<li>quarantine: \u8ff7\u60d1\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u308c\u3066\uff08\u9694\u96e2\uff09<\/li>\n<li>reject: \u53d7\u4fe1\u3057\u306a\u3044\u3067\u62d2\u5426\u3057\u3066\uff08\u62d2\u5426\uff09<\/li>\n<\/ul>\n<p>&nbsp;<br \/>\nGmail\u306e\u9001\u4fe1\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3067\u306fnone\u3067\u3082OK\u3068\u8a00\u53ca\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u57fa\u672c\u7684\u306b\u306f\u6700\u521d\u306fnone\u3092\u6307\u5b9a\u3057\u3066\u304a\u304d\u3001\u554f\u984c\u306a\u3051\u308c\u3070\u5fc5\u8981\u306b\u5fdc\u3058\u3066quarantine\u3084reject\u3068\u3088\u308a\u53b3\u3057\u304f\u3059\u308b\u624b\u9806\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3>\u30e1\u30fc\u30eb\u8ee2\u9001\u3084\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u3067\u8d77\u3053\u308a\u3046\u308b\u8a8d\u8a3c\u554f\u984c<\/h3>\n<p>SPF\u30fbDKIM\u30fbDMARC\u306e\u8a2d\u5b9a\u3092\u3057\u3066\u3044\u3066\u3082\u3001\u300c\u30e1\u30fc\u30eb\u306e\u81ea\u52d5\u8ee2\u9001\u300d\u3084\u300c\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u904b\u7528\u300d\u3067\u3001\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u306a\u306e\u306bSPF\u3084DKIM\u304cFail(\u307e\u305f\u306fSoftFail)\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<span class=\"youtube-insert-link\">\u203b<a href=\"https:\/\/www.youtube.com\/watch?v=yS-qVxYb_Xw&#038;t=754s\" target=\"_blank\">\u52d5\u753b\u672c\u7de8\u306e12:34\u301c<\/a>\u3067\u89e3\u8aac<\/span><\/p>\n<p>\u4f8b\u3048\u3070\u30e1\u30fc\u30eb\u8ee2\u9001\u51e6\u7406\u306e\u904e\u7a0b\u3067\u9001\u4fe1\u30b5\u30fc\u30d0\u30fc\u304c\u5909\u308f\u3063\u3066\u3057\u307e\u3046\u305f\u3081\u3001SPF\u3067\u8a18\u8ff0\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3068\u9055\u3046\u3068\u8a8d\u8b58\u3055\u308c\u305f\u308a\u3001\u6539\u3056\u3093\u3068\u8a8d\u8b58\u3055\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-mail-transfer-limitation.png\" alt=\"\" width=\"1200\" height=\"666\" class=\"alignnone size-full wp-image-71134\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-mail-transfer-limitation.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/slide-mail-transfer-limitation-1024x568.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\n&nbsp;<\/p>\n<p>\u305f\u3060\u3057\u3001\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u3067\u4e2d\u9593\u51e6\u7406\u3092\u3057\u3066\u304f\u308c\u308c\u3070\u8ee2\u9001\u51e6\u7406\u3092\u631f\u3093\u3067\u3082\u3046\u307e\u304f\u30d1\u30b9\u3067\u304d\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\uff08\u30b5\u30fc\u30d0\u30fc\u4ed5\u69d8\u306e\u554f\u984c\u306a\u306e\u3067\u5951\u7d04\u8005\u5074\u3067\u306e\u5bfe\u5fdc\u306f\u96e3\u3057\u3044\uff09<\/p>\n<blockquote><p>ARC<br \/>\n\u30e1\u30fc\u30eb\u8ee2\u9001\u6642\u306bDKIM\u7f72\u540d\u304c\u5931\u6557\u3059\u308b\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u305f\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n<p>\u30e1\u30fc\u30eb\u3092\u8ee2\u9001\u3059\u308b\u3068\u3001\u4ef6\u540d\u3084\u5185\u5bb9\u3001\u30d8\u30c3\u30c0\u30fc\u304c\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u3053\u308c\u304cDKIM\u306e\u691c\u8a3c\u3067\u300c\u5931\u6557\u300d\u3068\u898b\u306a\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\nARC\u7f72\u540d\u306f\u3001\u5404\u4e2d\u7d99\u30b5\u30fc\u30d0\u30fc\u304c\u30e1\u30fc\u30eb\u3092\u8a8d\u8a3c\u3057\u305f\u7d50\u679c\u3092\u30d8\u30c3\u30c0\u30fc\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<br \/>\n\u3053\u306e\u5c65\u6b74\u60c5\u5831\u3092\u4f7f\u3063\u3066\u3001\u53d7\u4fe1\u5074\u306e\u30b5\u30fc\u30d0\u30fc\u306f\u30e1\u30fc\u30eb\u306e\u4fe1\u983c\u6027\u3092\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<br \/>\n\u3053\u308c\u306b\u3088\u308a\u53d7\u4fe1\u8005\u306f\u30e1\u30fc\u30eb\u304c\u6b63\u5f53\u306a\u3082\u306e\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3084\u3059\u304f\u306a\u308a\u3001\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u3084\u306a\u308a\u3059\u307e\u3057\u3092\u9632\u304e\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/help.sakura.ad.jp\/mail\/2811\/\" target=\"_blank\">DKIM\/ARC\/DMARC\u3068\u306f | \u3055\u304f\u3089\u306e\u30d8\u30eb\u30d7\u30da\u30fc\u30b8<\/a><\/p>\n<\/blockquote>\n<p>&nbsp;<\/p>\n<h2>SPF\u30fbDKIM\u30fbDMARC\u304c\u3069\u3046\u306a\u3063\u3066\u3044\u308b\u304b\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5<\/h2>\n<p>\u5bfe\u7b56\u304c\u6e08\u3093\u3067\u3044\u308b\u304b\u308f\u304b\u3089\u306a\u3044\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h3>\u73fe\u72b6\u3069\u3046\u306a\u3063\u3066\u3044\u308b\u304b\u306e\u78ba\u8a8d\u65b9\u6cd5<\/h3>\n<p>\u7c21\u5358\u306a\u306e\u306fGmail\u3067\u300c\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30bd\u30fc\u30b9\u3092\u8868\u793a\u300d\u3067\u30d8\u30c3\u30c0\u30fc\u60c5\u5831\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<span class=\"youtube-insert-link\">\u203b<a href=\"https:\/\/www.youtube.com\/watch?v=yS-qVxYb_Xw&#038;t=807s\" target=\"_blank\">\u52d5\u753b\u672c\u7de8\u306e13:27\u301c<\/a>\u3067\u89e3\u8aac<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-1.png\" alt=\"\" width=\"1200\" height=\"760\" class=\"alignnone size-full wp-image-71169\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-1.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-1-1024x649.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>PASS\u3068\u306a\u3063\u3066\u3044\u308c\u3070OK\u3067\u3059\u3002\u4e00\u65b9\u3001FAIL\u3084SOFTFAIL\u3068\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u5bfe\u7b56\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-2.png\" alt=\"\" width=\"1200\" height=\"506\" class=\"alignnone size-full wp-image-71168\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-2.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-2-1024x432.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-3.png\" alt=\"\" width=\"1200\" height=\"460\" class=\"alignnone size-full wp-image-71165\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-3.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-source-display-3-1024x393.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>\u306a\u304a\u3001Google\u304c\u63d0\u4f9b\u3059\u308b <b>\u300cPostmaster Tools\u300d<\/b> \u306b\u30c9\u30e1\u30a4\u30f3\u3092\u767b\u9332\u3059\u308b\u3068\u3001\u81ea\u793e\u306e\u30e1\u30fc\u30eb\u304cGmail\u304b\u3089\u3069\u3046\u8a55\u4fa1\u3055\u308c\u3066\u3044\u308b\u304b\uff08\u8ff7\u60d1\u30e1\u30fc\u30eb\u7387\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u8a55\u5224\u306a\u3069\uff09\u3092\u30b0\u30e9\u30d5\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u5927\u91cf\u9001\u4fe1\u8005\u306f\u767b\u9332\u5fc5\u9808\u30ec\u30d9\u30eb\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<p><a href=\"https:\/\/support.google.com\/a\/answer\/9981691?hl=ja\" target=\"_blank\">Postmaster Tools \u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7 | Google Workspace \u7ba1\u7406\u8005\u30d8\u30eb\u30d7<\/a><\/p>\n<p>&nbsp;<\/p>\n<h3>DNS\u8a2d\u5b9a\u306e\u8ffd\u52a0<\/h3>\n<p>SPF\u3084DMARC\u306e\u8a2d\u5b9a\u306fDNS\u3078\u306e\u30ec\u30b3\u30fc\u30c9\u8ffd\u52a0\u3067\u8a2d\u5b9a\u3067\u304d\u308b\u305f\u3081\u3001\u5951\u7d04\u8005\u81ea\u8eab\u3067\u3082\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u300c\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc(\u30c9\u30e1\u30a4\u30f3)\u4f1a\u793e\u540d\uff0b\u3000SPF\u300d\u306a\u3069\u3067\u691c\u7d22\u3059\u308b\u3068\u591a\u304f\u306e\u5834\u5408\u30d8\u30eb\u30d7\u30da\u30fc\u30b8\u306a\u3069\u304c\u30d2\u30c3\u30c8\u3057\u307e\u3059\u306e\u3067\u3001\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/xserver-about-lolipop.png\" alt=\"\" width=\"1200\" height=\"713\" class=\"alignnone size-full wp-image-71167\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/xserver-about-lolipop.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/xserver-about-lolipop-1024x608.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\n&nbsp;<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/xserver-about-spf.png\" alt=\"\" width=\"1200\" height=\"710\" class=\"alignnone size-full wp-image-71166\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/xserver-about-spf.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/xserver-about-spf-1024x606.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><br \/>\n&nbsp;<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u307e\u3068\u3081\u3067\u3059\u3002\u4eca\u56de\u306fGmail\u306e\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u30d9\u30fc\u30b9\u306bSPF\u30fbDKIM\u30fbDMARC\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<br \/>\n<img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline.png\" alt=\"\" width=\"1200\" height=\"669\" class=\"alignnone size-full wp-image-71141\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline.png 1200w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2025\/11\/gmail-sender-guideline-1024x571.png 1024w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<table>\n<tbody>\n<tr>\n<td><strong>SPF<\/strong>(Sender Policy Framework\uff09<\/td>\n<td><strong>\u9001\u4fe1\u30e1\u30fc\u30eb\u304c\u3001\u4e8b\u524d\u306b\u8a31\u53ef\u3055\u308c\u305f\uff08DNS\u30ec\u30b3\u30fc\u30c9\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\uff09\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u3089\u308c\u3066\u3044\u307e\u3059\u3088\u3001\u3068\u3044\u3046\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\u3002<br \/>\n<\/strong>\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u3068\u306f\u7121\u95a2\u4fc2\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3067\u306a\u3044\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u4ed5\u7d44\u307f<\/td>\n<\/tr>\n<tr>\n<td><strong>DKIM(<\/strong>DomainKeys Identified Mail\uff09<\/td>\n<td><strong>\u30e1\u30fc\u30eb\u304c\u9001\u4fe1\u9014\u4e2d\u3067\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u8a3c\u660e\u3059\u308b\u30e1\u30fc\u30eb\u8a8d\u8a3c\u306e\u4ed5\u7d44\u307f\uff08\u96fb\u5b50\u7f72\u540d\uff09<br \/>\n<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>DMARC(<\/strong>Domain-based Message Authentication, Reporting, and Conformance<\/td>\n<td>\u524d\u8ff0\u306eSPF\u3068DKIM\u306e\u3069\u3061\u3089\u304b\u3001\u307e\u305f\u306f\u4e21\u65b9\u306b\u5931\u6557\u3057\u305f\u30e1\u30fc\u30eb\u3092\u3001\u53d7\u4fe1\u5074\uff08Gmail\uff09\u304c\u3069\u3046\u6271\u3046\u3079\u304d\u304b\u3092\u3001\u9001\u4fe1\u5074\u304c\u3042\u3089\u304b\u3058\u3081\u6307\u793a\u3057\u3066\u304a\u304f\u4ed5\u7d44\u307f<br \/>\n\uff08\u305d\u306e\u307e\u307e\u53d7\u4fe1\u3057\u3066\/\u8ff7\u60d1\u30e1\u30fc\u30eb\u306b\u632f\u308a\u5206\u3051\u3066\/\u5ec3\u68c4\u3057\u3066\u304b\u3089\u9078\u629e\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>\u4eca\u56de\u306f\u4ee5\u4e0a\u306b\u306a\u308a\u307e\u3059\u3002\u6700\u5f8c\u307e\u3067\u3054\u89a7\u3044\u305f\u3060\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\u3002<\/p>\n<div class=\"sb-type-drop\">\n\t<div class=\"sb-subtype-a\">\n\t\t<div class=\"sb-speaker\">\n\t\t\t<div class=\"sb-icon\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/plugins\/speech-bubble\/img\/boy-point.jpg\" class=\"sb-icon\">\n\t\t\t<\/div>\n\t\t\t<div class=\"sb-name\"><\/div>\n\t\t<\/div>\n\t\t<div class=\"sb-content\">\n\t\t\t<div class=\"sb-speech-bubble\"><span class=\"font-14\"><strong>\u300c\u696d\u8005\u306b\u4efb\u305b\u305f\u3051\u3069\u3001\u66f4\u65b0\u304c\u3067\u304d\u306a\u3044\u300d\u300c\u672c\u3067\u72ec\u5b66\u306f\u6642\u9593\u304c\u304b\u304b\u308a\u3059\u304e\u308b\u30fb\u30fb\u300d<\/strong>\u305d\u3093\u306a\u304a\u60a9\u307f\u306e\u65b9\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/span><\/p>\n<p><span class=\"font-14\"><strong>\u500b\u5225\u6307\u5c0e\u5f62\u5f0f\u306e\u30b9\u30af\u30fc\u30eb\u3067\u306f\u3001\u81ea\u5206\u306e\u77e5\u308a\u305f\u3044\u3053\u3068\u3092\u30d4\u30f3\u30dd\u30a4\u30f3\u30c8\u3067\u5b66\u7fd2\u30fb\u9054\u6210\u3067\u304d\u3001\u81ea\u5206\u3067\u66f4\u65b0\u3082\u3067\u304d\u308b\u3068\u3044\u3046\u30e1\u30ea\u30c3\u30c8<\/strong>\u3082\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span class=\"font-14\">\u6559\u5ba4\u306e\u7121\u6599\u4e8b\u524d\u76f8\u8ac7\u3082\u3057\u3066\u304a\u308a\u307e\u3059\u306e\u3067\u3001\u307e\u305a\u306f\u304a\u6c17\u8efd\u306b\u3054\u767b\u9332\u304f\u3060\u3055\u3044\u3002 <\/span><\/p>\n<p class=\"text-center\"><a href=\"https:\/\/webst8.com\/\" class=\"webst8-banar-2 btn btn-success btn-lg\">\u8a73\u7d30\u306f\u3053\u3061\u3089<\/a><\/p>\n<p><\/div>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<h2>YouTube\u30c1\u30e3\u30f3\u30cd\u30eb\u958b\u8a2d\u3057\u307e\u3057\u305f\uff01<\/h2>\n<p><a href=\"https:\/\/www.youtube.com\/channel\/UCYIqpw7ZJFgMGMSLhWq83Fg\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel.jpg\" alt=\"WEBST8\u3000YouTube Channel\u3000\u958b\u8a2d\" width=\"2428\" height=\"1104\" class=\"alignnone size-full wp-image-24529\" srcset=\"https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel.jpg 2428w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel-300x136.jpg 300w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel-1024x466.jpg 1024w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel-768x349.jpg 768w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel-1536x698.jpg 1536w, https:\/\/webst8.com\/blog\/wp-content\/uploads\/2021\/05\/webst8-youtube-channel-2048x931.jpg 2048w\" sizes=\"(max-width: 2428px) 100vw, 2428px\" \/><\/a><br \/>\n\u6700\u5927\u6708\u959350\u4e07PV\u306e\u5f53\u30d6\u30ed\u30b0\u3092\u30d9\u30fc\u30b9\u306b\u3001Youtube\u52d5\u753b\u914d\u4fe1\u306b\u3066WordPress\u3001\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u4f5c\u6210\u3001\u30d6\u30ed\u30b0\u306e\u3053\u3068\u306b\u3064\u3044\u3066\u304a\u5f79\u7acb\u3061\u60c5\u5831\u3092\u968f\u6642\u914d\u4fe1\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u3054\u8208\u5473\u3042\u308b\u65b9\u306f\u305c\u3072\u30c1\u30e3\u30f3\u30cd\u30eb\u767b\u9332\u3092\u3057\u3066\u3044\u305f\u3060\u3051\u307e\u3059\u3068\u5e78\u3044\u3067\u3059\u3002<\/p>\n<div class=\"rankstlink-r2\">\n<p><a href=\"https:\/\/www.youtube.com\/channel\/UCYIqpw7ZJFgMGMSLhWq83Fg\" target=\"_blank\" rel=\"noopener\">YouTube\u30c1\u30e3\u30f3\u30cd\u30eb\u306f\u3053\u3061\u3089<\/a><\/p>\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>\u300c\u6700\u8fd1\u3001\u304a\u5ba2\u69d8\u304b\u3089\u300e\u30e1\u30fc\u30eb\u304c\u5c4a\u3044\u3066\u3044\u306a\u3044\u300f\u3068\u8a00\u308f\u308c\u308b\u3053\u3068\u304c\u5897\u3048\u305f\u300d \u300c\u30e1\u30eb\u30de\u30ac\u306e\u958b\u5c01\u7387\u304c\u6025\u306b\u4e0b\u304c\u3063\u305f\u300d 2024\u5e74\u4ee5\u964d\u3001Gmail\u306f\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3084\u30b9\u30d1\u30e0\u5bfe\u7b56\u3092\u5927\u5e45\u306b\u5f37\u5316\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a &#8230; <\/p>\n","protected":false},"author":1,"featured_media":71177,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wp_rev_ctl_limit":""},"categories":[446],"tags":[],"class_list":["post-71151","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gmail"],"_links":{"self":[{"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/posts\/71151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/comments?post=71151"}],"version-history":[{"count":20,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/posts\/71151\/revisions"}],"predecessor-version":[{"id":71230,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/posts\/71151\/revisions\/71230"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/media\/71177"}],"wp:attachment":[{"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/media?parent=71151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/categories?post=71151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webst8.com\/blog\/wp-json\/wp\/v2\/tags?post=71151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}