{"id":27019,"date":"2026-02-08T07:01:18","date_gmt":"2026-02-07T22:01:18","guid":{"rendered":"https:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/?p=27019"},"modified":"2026-07-12T17:52:40","modified_gmt":"2026-07-12T08:52:40","slug":"%e3%82%b9%e3%83%91%e3%83%a0%e3%83%a1%e3%83%bc%e3%83%ab%e5%af%be%e7%ad%96","status":"publish","type":"post","link":"https:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/2026\/02\/08\/%e3%82%b9%e3%83%91%e3%83%a0%e3%83%a1%e3%83%bc%e3%83%ab%e5%af%be%e7%ad%96\/","title":{"rendered":"\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u5bfe\u7b56"},"content":{"rendered":"<p>\u6700\u8fd1\u306f\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u304c\u5927\u91cf\u306b\u5c4a\u304f\u6bce\u65e5\u3067\u3059\u3002\u3000\u4ee5\u524d\u306f\u5909\u306a\u65e5\u672c\u8a9e\u3067\u66f8\u304b\u308c\u305f\u30e1\u30fc\u30eb\u3067\u3057\u305f\u304c\u3001AI\u306e\u9032\u5316\u3067\u6700\u8fd1\u306f\u602a\u3057\u3044\u65e5\u672c\u8a9e\u3067\u306f\u306a\u304f\u306a\u308a\u3001\u5224\u5225\u3082\u96e3\u3057\u304f\u306a\u3063\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u3082\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u304c\u5927\u534a\u3067\u3046\u3063\u304b\u308a\u3059\u308b\u3068\u500b\u4eba\u60c5\u5831\u3092\u76d7\u3089\u308c\u3066\u3057\u307e\u3063\u305f\u308a\u3001\u8a50\u6b3a\u306b\u5f15\u3063\u304b\u304b\u308b\u53ef\u80fd\u6027\u3082\u3067\u3066\u304d\u307e\u3057\u305f\u3002\u3000\u4f8b\u3048\u3070\u81ea\u5206\u304c\u30b7\u30e7\u30c3\u30d4\u30f3\u30b0\u30b5\u30a4\u30c8\u306a\u3069\u3067\u4f55\u304b\u3092\u6ce8\u6587\u3057\u3066\u3044\u305f\u6642\u3068\u305f\u307e\u305f\u307e\u65e5\u306b\u3061\u304c\u91cd\u306a\u3063\u3066\u3001\u904b\u9001\u4f1a\u793e\u304b\u3089\u4e0d\u5728\u5c4a\u307f\u305f\u3044\u306a\u30e1\u30fc\u30eb\u304c\u6765\u3066\u3044\u308b\u3068\u3046\u3063\u304b\u308a\u3059\u308b\u3068\u5f15\u3063\u304b\u304b\u3063\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u305f\u3081\u306e\u5bfe\u7b56\u3068\u3057\u3066\u81ea\u5b85\u30b5\u30fc\u30d0\u30fc\u306b\u306f\u3001\u30a6\u30a3\u30eb\u30b9\u9664\u53bb\u3001\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u9664\u53bb\u3001\u305d\u3057\u3066\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u5bfe\u7b56\u3068\u3057\u3066<a href=\"https:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/2015\/11\/19\/dkim%e5%b0%8e%e5%85%a5\/\">DKIM\u3092\u5165\u308c\u3066\u5bfe\u7b56<\/a>\u3057\u3066\u304d\u307e\u3057\u305f\u3002\uff08\u3053\u306e2015\u5e74\u306bDKIM\u5c0e\u5165\u6642\u306e\u5bfe\u7b56\u306f\u81ea\u5206\u306e\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u308a\u5148\u306b\u5bfe\u3057\u3066\u306e\u5bfe\u7b56\u3067\u3057\u305f\u3002\u3064\u307e\u308aDKIM\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u76f8\u624b\u30b5\u30fc\u30d0\u30fc\u306b\u5b89\u5fc3\u3057\u3066\u3082\u3089\u3046\u3068\u3044\u3046\u65b9\u5411\u3060\u3051\u3067\u3057\u305f\u3002\uff09<\/p>\n<p>\u3057\u304b\u3057\u4e0a\u8a18\u306e\u3088\u3046\u306b\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u304c\u5897\u3048\u3001\u5373\u30b4\u30df\u7bb1\u306b\u5165\u308b\u3082\u306e\u306e\u3001\u305d\u306e\u6570\u304c1\u65e5\u306b100\u901a\u3068\u3044\u3046\u81a8\u5927\u306a\u6570\u306b\u306a\u308a\u3001\u7d76\u5bfe\u898b\u306a\u3044\u30e1\u30fc\u30eb\u306b\u81ea\u5b85\u30b5\u30fc\u30d0\u30fc\u306e\u30d1\u30ef\u30fc\u3084\u5149\u56de\u7dda\u306e\u5bb9\u91cf\u3092\u4f7f\u3046\u306e\u306f\u7121\u99c4\u3001\u3044\u3044\u52a0\u6e1b\u306b\u3057\u3066\u307b\u3057\u3044\u3068\u3044\u3046\u601d\u3044\u3067\u3001\u81ea\u5b85\u30b5\u30fc\u30d0\u30fc\u3067\u53d7\u4fe1\u3059\u308b\u65b9\u5411\u306b\u5bfe\u3057\u3066\u3082\u5bfe\u7b56\u3092\u3068\u308a\u3001\u602a\u3057\u3044\u30e1\u30fc\u30eb\u306f\u53d7\u4fe1\u3059\u308b\u524d\u306b\u906e\u65ad\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u306e\u4ed5\u7d44\u307f\u304cSPF (Sender Policy Framework)\u3001DKIM (DomainKeys Identified Mail)\u3001\u305d\u3057\u3066DMARC (Domain-based Message Authentication, Reporting and Conformance)\u3067\u3059\u3002<\/p>\n<p><a href=\"http:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/wp-content\/uploads\/2026\/02\/dmarc.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-27020\" src=\"http:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/wp-content\/uploads\/2026\/02\/dmarc.jpg\" alt=\"\" width=\"481\" height=\"328\" srcset=\"https:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/wp-content\/uploads\/2026\/02\/dmarc.jpg 481w, https:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/wp-content\/uploads\/2026\/02\/dmarc-300x205.jpg 300w, https:\/\/www.kawauchi.homeip.mydns.jp\/jh0cjh\/blog\/wp-content\/uploads\/2026\/02\/dmarc-150x102.jpg 150w\" sizes=\"auto, (max-width: 481px) 100vw, 481px\" \/><\/a><\/p>\n<p>\u305d\u308c\u305e\u308c\u306e\u6a5f\u80fd\u3092\u307e\u3068\u3081\u308b\u3068<\/p>\n<ul>\n<li>SPF\uff1a\u9001\u4fe1\u5143\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u898b\u3066\u6b63\u5f53\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d<\/li>\n<li>DKIM\uff1a\u30e1\u30fc\u30eb\u30d8\u30c3\u30c0\u30fc\u306b\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u7f72\u540d\u3092\u898b\u3066\u30e1\u30fc\u30eb\u306b\u6539\u3056\u3093\u304c\u306a\u3044\u304b\u3092\u78ba\u8a8d<\/li>\n<li>DMARC\uff1aSPF\u3068DKIM\u306e\u7d50\u679c\u3092\u53d7\u3051\u3066\u602a\u3057\u3044\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u524d\u306b\u62d2\u5426<\/li>\n<li>ClamAV\uff1a\u30a6\u30a3\u30eb\u30b9\u9664\u53bb<\/li>\n<li>Spam Assassin\uff1a\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306e\u5185\u5bb9\u3092\u53d7\u4fe1\u306e\u5ea6\u306b\u5b66\u7fd2\u3057\u3001\u30b9\u30d1\u30e0\u3068\u5224\u65ad\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3092\u5ec3\u68c4<\/li>\n<\/ul>\n<p>\u3068\u3044\u3046\u3053\u3068\u3067\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u524d\u306bSPF\u2192DKIM\u2192DMARC\u3068\u5224\u65ad\u30fb\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u602a\u3057\u3044\u9001\u4fe1\u5143\u3084\u6539\u3056\u3093\u3057\u305f\u9001\u308a\u4e3b\u306e\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u3059\u308b\u524d\u306b\u62d2\u5426\u3057\u3066\u3057\u307e\u3046\u5f62\u3067\u3059\u3002<\/p>\n<p>\u3053\u306eSPF+DKIM+DMARC\u3067\u3084\u3063\u3066\u3044\u308b\u306e\u306f\u30e1\u30fc\u30eb\u306e\u9001\u308a\u4e3b\u306e\u6b63\u5f53\u6027\u306e\u5224\u65ad\u3067\u3001\u507d\u88c5\u30c9\u30e1\u30a4\u30f3\u3068\u304b\u9001\u4fe1\u30b5\u30fc\u30d0\u30fc\u306e\u7f72\u540d\u304c\u306a\u3044\u3068\u304b\u3001\u306a\u308a\u3059\u307e\u3057\u306a\u3069\u304c\u3042\u308b\u3068\u53d7\u4fe1\u3092\u62d2\u5426\u3059\u308b\u3082\u306e\u3067\u3001\u305d\u306e\u30e1\u30fc\u30eb\u304c\u30b9\u30d1\u30e0\u304b\u3069\u3046\u304b\u3068\u304b\u3001\u30a6\u30a3\u30eb\u30b9\u30e1\u30fc\u30eb\u304b\u3069\u3046\u304b\u3068\u3044\u3046\u3001\u30e1\u30fc\u30eb\u306e\u5185\u5bb9\u307e\u3067\u306f\u5224\u65ad\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u3000\u4e2d\u306b\u306f\u6b63\u3005\u5802\u3005\u3068\u9001\u3063\u3066\u304f\u308b\u300c\u6b63\u5f53\u306a\u30b9\u30d1\u30e0\uff1f\u300d\u304c\u3042\u308b\u306e\u3067\u3053\u308c\u306fSPF+DKIM+DMARC\u3092\u3059\u308a\u629c\u3051\u3066\u304d\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u305d\u306e\u5f8c\u306b\u7d9a\u3044\u3066\u51e6\u7406\u3059\u308b\u30a6\u30a3\u30eb\u30b9\u9664\u53bb\u3084\u30b9\u30d1\u30e0\u306e\u30d5\u30a3\u30eb\u30bf\u30fc\u3067\u5ec3\u68c4\u3055\u308c\u308b\u3068\u3044\u3046\u5f62\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u307b\u3068\u3093\u3069\u306e\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u767a\u4fe1\u8005\u306f\u507d\u88c5\u3057\u305f\u308a\u3001\u306a\u308a\u3059\u307e\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u3053\u308c\u3067\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306e\u6570\u306f\u6fc0\u6e1b\u3057\u30011\u65e5100\u901a\u307b\u3069\u6765\u3066\u3044\u305f\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u306f1\u65e510\u901a\u4ee5\u4e0b\u307e\u3067\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3000\u305d\u3057\u3066\u3001\u305d\u306e\u3059\u308a\u629c\u3051\u3066\u304d\u305f\u300c\u6b63\u5f53\u306a\u30b9\u30d1\u30e0\u300d\u3082Spam Assassin\u30d5\u30a3\u30eb\u30bf\u30fc\u3067100\uff05\u5ec3\u68c4\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u3053\u306e\u5bfe\u7b56\u3092\u3059\u308b\u307e\u3067\u30011\u65e5100\u901a\u3082\u30b9\u30d1\u30e0\u3092\u53d7\u4fe1\u3057\u3066\u3044\u305f\u305f\u3081\u3001\u5927\u91cf\u306b\u5b66\u7fd2\u3055\u305b\u3066\u3044\u305f\u3060\u3044\u305f\u304a\u304b\u3052\u3067\u3082\u3042\u308a\u307e\u3059\uff08\u7b11\uff09<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u81ea\u5b85\u30b5\u30fc\u30d0\u30fc\u3067SPF\u30fbDKIM\u30fbDMARC\u3092\u53d7\u4fe1\u5074\u306b\u3082\u5c0e\u5165\u3057\u3001\u306a\u308a\u3059\u307e\u3057\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\u524d\u306b\u62d2\u5426\u3002ClamAV\u3068SpamAssassin\u3092\u4f75\u7528\u3057\u305f\u30b9\u30d1\u30e0\u5bfe\u7b56\u306e\u8a18\u9332\u3067\u3059\u3002<\/p>\n","protected":false},"author":2,"featured_media":24470,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[368,365,366,367,364,363,362,193],"class_list":["post-27019","post","type-post","status-publish","format-standard","has-post-thumbnail","category-24","tag-clamav","tag-dkim","tag-dmarc","tag-spamassassin","tag-spf","tag-363","tag-362","tag-193"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- 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