{"id":21816,"date":"2018-12-22T09:00:37","date_gmt":"2018-12-22T00:00:37","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=21816"},"modified":"2019-01-23T11:07:30","modified_gmt":"2019-01-23T02:07:30","slug":"mta-sts","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2018\/12\/22\/mta-sts\/","title":{"rendered":"MTA-STS \u3092\u8a2d\u5b9a\u3057\u3066\u307f\u305f"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3002\u30a4\u30f3\u30d5\u30e9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u672b\u5ee3\u3067\u3059\u3002<br \/>\n<a href=\"http:\/\/www.techscore.com\/blog\/2018\/11\/22\/techscore-advent-calendar-2018\/\">TECHSCORE Advent Calendar 2018<\/a> 22\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>2018\u5e749\u6708\u306b <a href=\"https:\/\/tools.ietf.org\/html\/rfc8461\">RFC 8461 - SMTP MTA Strict Transport Security (MTA-STS)<\/a> \u304c\u767a\u884c\u3055\u308c\u305f\u306e\u3067\u8a2d\u5b9a\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<h2>MTA-STS \u304c\u751f\u307e\u308c\u305f\u80cc\u666f<\/h2>\n<p>MTA\u9593\u306e\u901a\u4fe1\u6697\u53f7\u5316\u306b\u306f <a href=\"https:\/\/tools.ietf.org\/html\/rfc3207\">STARTTLS<\/a> \u304c\u7528\u3044\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001STARTTLS \u306f\u65e5\u548c\u898b\u6697\u53f7\u5316\u3067\u3042\u308b\u305f\u3081\u3001\u9001\u4fe1\u5074\u3068\u53d7\u4fe1\u5074\u3068\u306e\u9593\u3067\u6697\u53f7\u5316\u306b\u3064\u3044\u3066\u5408\u610f\u306b\u81f3\u3089\u306a\u3051\u308c\u3070\u5e73\u6587\u3067\u306e\u901a\u4fe1\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066 STARTTLS \u306f\u901a\u4fe1\u8def\u4e0a\u306e\u76d7\u8074\u306b\u5bfe\u3057\u3066\u306f\u5f37\u56fa\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u304c\u3001\u6b21\u306e\u3088\u3046\u306b STARTTLS \u306e\u4f7f\u7528\u3092\u8fc2\u56de\u3055\u305b\u308b\u653b\u6483\u306b\u306f\u7121\u529b\u3067\u3059\u3002<\/p>\n<ul>\n<li>EHLO \u30b3\u30de\u30f3\u30c9\u3078\u306e\u5fdc\u7b54\u304b\u3089 \"250 STARTTLS\" \u3092\u524a\u9664\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u53d7\u4fe1\u5074\u304c STARTTLS \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u304b\u306e\u3088\u3046\u306b\u9001\u4fe1\u5074\u306b\u898b\u305b\u304b\u3051\u308b\u3002<\/li>\n<li>\u507d\u306e MX \u30ec\u30b3\u30fc\u30c9\u3092\u9001\u308a\u3064\u3051\u305f\u308a BGP \u3067\u7d4c\u8def\u3092\u637b\u3058\u66f2\u3052\u305f\u308a\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u507d\u306e MX \u306b\u63a5\u7d9a\u3055\u305b\u308b\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306a\u653b\u6483\u306b\u5bfe\u6297\u3059\u308b\u624b\u6bb5\u3068\u3057\u3066 <a href=\"https:\/\/tools.ietf.org\/html\/rfc7672\">DANE<\/a> \u304c\u3042\u308a\u307e\u3059\u304c\u3001DNSSEC \u306e\u8a2d\u5b9a\u304c\u5fc5\u8981\u3067\u3059\u3002\u4e16\u306e\u4e2d\u306b\u306f\uff12\u7a2e\u985e\u306e\u4eba\u9593\u304c\u3044\u307e\u3059\u3002DNSSEC \u3092\u8a2d\u5b9a\u3057\u305f\u3044\u4eba\u3068\u305d\u3046\u3067\u306f\u306a\u3044\u4eba\u3067\u3059\u3002\u5f8c\u8005\uff08\u79c1\u3082\u3067\u3059\uff09\u306e\u305f\u3081\u306b DNSSEC \u3092\u5fc5\u8981\u3068\u3057\u306a\u3044\u5bfe\u6297\u7b56\u3068\u3057\u3066 MTA-STS \u304c\u8003\u3048\u3089\u308c\u305f\u305d\u3046\u3067\u3059\u3002<\/p>\n<h2>MTA-STS \u306b\u3088\u308b\u554f\u984c\u306e\u89e3\u6c7a<\/h2>\n<p>MTA-STS \u3067\u306f\u3001\u30e1\u30fc\u30eb\u53d7\u4fe1\u5074\u304c DNS \u3068 HTTPS \u3092\u4f7f\u3063\u3066\u6b21\u306e\u60c5\u5831\u3092\u30dd\u30ea\u30b7\u30fc\u3068\u3057\u3066\u516c\u958b\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u8a8d\u8a3c\u5c40\u304b\u3089\u767a\u884c\u3055\u308c\u305f\u8a3c\u660e\u66f8\u3092\u7528\u3044\u305f TLS \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u6b63\u898f\u306e MX \u30db\u30b9\u30c8\u306e\u30ea\u30b9\u30c8<\/li>\n<li>\u4e0a\u8a18\u306b\u53cd\u3057\u3066\u3044\u308b\u5834\u5408\u306e\u9001\u4fe1\u5074\u306e\u632f\u308b\u821e\u3044\u65b9<\/li>\n<\/ul>\n<p>\u9001\u4fe1\u5074\u306f\u3001\u3053\u306e\u30dd\u30ea\u30b7\u30fc\u3092\u53d6\u5f97\u3057\u3066\u30e1\u30fc\u30eb\u9001\u4fe1\u5148\u306e MX \u3092\u691c\u8a3c\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u4e0a\u8a18\u306b\u6319\u3052\u305f\u3088\u3046\u306a STARTTLS \u3092\u8fc2\u56de\u3055\u305b\u308b\u653b\u6483\u3092\u691c\u77e5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>SMTP \u306e\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306a\u306e\u306b HTTPS \u3092\u7528\u3044\u308b\u306e\u306f\u6c17\u6301\u3061\u60aa\u3044\u3067\u3059\u304c\u3001HTTPS \u306b\u3088\u3063\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u62c5\u4fdd\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>MTA-STS \u306e\u8a2d\u5b9a<\/h2>\n<p>\u53d7\u4fe1\u5074\u306e MTA-STS \u5bfe\u5fdc\u306f\u7c21\u5358\u3067\u3059\u3002\u6b21\u306e3\u30b9\u30c6\u30c3\u30d7\u3067\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u5168\u3066\u306e\u30e1\u30fc\u30eb\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u306b STARTTLS \u3092\u8a2d\u5b9a\u3059\u308b\u3002<\/li>\n<li>MTA-STS \u30dd\u30ea\u30b7\u30fc\u3092\u4f5c\u6210\u3057 HTTPS \u3067\u516c\u958b\u3059\u308b\u3002<\/li>\n<li>DNS \u306b MTA-STS TXT \u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u3001techscore.com \u30c9\u30e1\u30a4\u30f3\u3092\u4f8b\u306b\u8a2d\u5b9a\u5185\u5bb9\u3092\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>STARTTLS \u8a2d\u5b9a<\/h3>\n<p>TLS \u306b\u7528\u3044\u308b\u8a3c\u660e\u66f8\u306f MX \u30db\u30b9\u30c8\u306e\u6b63\u898f\u306e\u8a3c\u660e\u66f8\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u3001\u4ee5\u4e0b\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>SAN (Subject Alternative Name) \u306e\u3044\u305a\u308c\u304b\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u304c MX \u30db\u30b9\u30c8\u540d\u306b\u30de\u30c3\u30c1\u3059\u308b\u3053\u3068<\/li>\n<li>\u8a8d\u8a3c\u5c40\u306b\u7f72\u540d\u3055\u308c\u305f\u6b63\u898f\u306e\u8a3c\u660e\u66f8\u3067\u3042\u308b\u3053\u3068<\/li>\n<li>\u6709\u52b9\u671f\u9650\u5185\u3067\u3042\u308a\u3001\u7834\u68c4\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068<\/li>\n<\/ul>\n<p>techscore.com \u306e MX \u306f mail.techscore.com \u3067\u3059\u306e\u3067\u3001mail.techscore.com \u306e\u8a3c\u660e\u66f8\u3092\u53d6\u5f97\u30fb\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre>techscore.com.     IN      MX      10 mail.techscore.com.<\/pre>\n<h3>MTA-STS \u30dd\u30ea\u30b7\u30fc\u306e\u516c\u958b<\/h3>\n<p>\u5bfe\u8c61\u30c9\u30e1\u30a4\u30f3\u306e mta-sts \u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067 MTA-STS \u30dd\u30ea\u30b7\u30fc\u3092\u516c\u958b\u3057\u307e\u3059\u3002<br \/>\ntechscore.com \u3067\u306f\u3001<a href=\"https:\/\/mta-sts.techscore.com\/.well-known\/mta-sts.txt\">https:\/\/mta-sts.techscore.com\/.well-known\/mta-sts.txt<\/a> \u3067\u4ee5\u4e0b\u306e\u5185\u5bb9\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre>\nversion: STSv1\nmode: testing\nmax_age: 604800\nmx: mail.techscore.com\n<\/pre>\n<ul>\n<li>\"version\" \u306f \"STSv1\" \u56fa\u5b9a\u3067\u3059\u3002<\/li>\n<li>\"mode\" \u306f\u3001\u9001\u4fe1\u5074\u304c\u30dd\u30ea\u30b7\u30fc\u306e\u691c\u8a3c\uff08MX \u30db\u30b9\u30c8\u540d\u3068\u8a3c\u660e\u66f8\u306e\u691c\u8a3c\uff09\u306b\u5931\u6557\u3057\u305f\u3068\u304d\u306b\u3069\u306e\u3088\u3046\u306b\u632f\u821e\u3046\u3079\u304d\u304b\u306e\u6307\u5b9a\u3067\u3059\u3002\u6b21\u306e3\u3064\u306e\u3046\u3061\u306e\u3044\u305a\u308c\u304b\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\n<ul>\n<li>\"enforce\": \u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u306f\u306a\u3089\u306a\u3044<\/li>\n<li>\"testing\": \u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\uff08\u5f8c\u8ff0\u3059\u308b <a href=\"https:\/\/tools.ietf.org\/html\/rfc8460\">TLSRPT<\/a> \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u691c\u8a3c\u5931\u6557\u306e\u30ec\u30dd\u30fc\u30c8\u3082\u884c\u306a\u3046\uff09<\/li>\n<li>\"none\": MTA-STS \u8a2d\u5b9a\u304c\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u3057\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\uff08MTA-STS \u5bfe\u5fdc\u3092\u53d6\u308a\u3084\u3081\u308b\u3068\u304d\u306b\u7528\u3044\u308b\uff09<\/li>\n<\/ul>\n<\/li>\n<li>\"max_age\" \u306f\u30dd\u30ea\u30b7\u30fc\u306e\u6709\u52b9\u671f\u9593\u306e\u6700\u5927\u5024\u3067\u3001\u79d2\u6570\u3067\u6307\u5b9a\u3057\u307e\u3059\u30021\u9031\u9593\u4ee5\u4e0a\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\"mx\" \u306f MX \u30db\u30b9\u30c8\u540d\u3067\u3059\u3002\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\uff08\u4f8b\uff1a*.example.com\uff09\u3067\u306e\u6307\u5b9a\u3082\u53ef\u80fd\u3067\u3059\u30021\u884c\u30671\u30db\u30b9\u30c8\u306e\u8a2d\u5b9a\u3092\u3059\u308b\u306e\u3067\u3001MX \u30db\u30b9\u30c8\u304c\u8907\u6570\u3042\u308b\u5834\u5408\u306f \"mx: \u30db\u30b9\u30c8\u540d\" \u306e\u884c\u3092\u5fc5\u8981\u306a\u3060\u3051\u7e70\u308a\u8fd4\u3057\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>MTA-STS TXT \u30ec\u30b3\u30fc\u30c9\u306e\u8a2d\u5b9a<\/h3>\n<p>\u5bfe\u8c61\u30c9\u30e1\u30a4\u30f3\u306e _mta-sts \u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b MTA-STS TXT \u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<br \/>\ntechscore.com \u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre>_mta-sts.techscore.com.     IN      TXT     \"v=STSv1; id=20181212T080808;\"<\/pre>\n<ul>\n<li>\"v\" \u306f \"STSv1\" \u56fa\u5b9a\u3067\u3059\u3002<\/li>\n<li>\"id\" \u306f MTA-STS \u30dd\u30ea\u30b7\u30fc\u66f4\u65b0\u306e\u6709\u7121\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u6587\u5b57\u5217\u3067\u3059\u3002 \u30dd\u30ea\u30b7\u30fc\u3054\u3068\u306b\u30e6\u30cb\u30fc\u30af\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u304c\u9806\u5e8f\u306f\u554f\u308f\u306a\u3044\u306e\u3067\u30e9\u30f3\u30c0\u30e0\u306a\u6587\u5b57\u5217\u3067\u3082\u3088\u3044\u3067\u3059\u3002\u30e1\u30fc\u30eb\u9001\u4fe1\u5074\u306f\u3053\u306e\u5024\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u30dd\u30ea\u30b7\u30fc\u306e\u518d\u53d6\u5f97\u304c\u5fc5\u8981\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u3067 MTA-STS \u306e\u8a2d\u5b9a\u306f\u5b8c\u4e86\u3067\u3059\u3002<\/p>\n<h3>TLSRPT \u306e\u8a2d\u5b9a<\/h3>\n<p><a href=\"https:\/\/tools.ietf.org\/html\/rfc8460\">TLSRPT<\/a> \u306f\u3001\u653b\u6483\u3084\u53d7\u4fe1\u5074\u306e\u8a2d\u5b9a\u30df\u30b9\u306b\u3088\u3063\u3066\u30e1\u30fc\u30eb\u9001\u4fe1\u3067\u304d\u306a\u304b\u3063\u305f\u308a\u5b89\u5168\u3067\u306a\u3044\u901a\u4fe1\u3067\u30e1\u30fc\u30eb\u9001\u4fe1\u305b\u3056\u308b\u3092\u5f97\u306a\u304b\u3063\u305f\u308a\u3057\u305f\u3068\u304d\u306b\u3001\u30e1\u30fc\u30eb\u9001\u4fe1\u5074\u304b\u3089\u53d7\u4fe1\u30c9\u30e1\u30a4\u30f3\u306b\u5bfe\u3057\u3066\u30ec\u30dd\u30fc\u30c8\u3059\u308b\u305f\u3081\u306e\u3057\u304f\u307f\u3067\u3059\u3002MTA-STS \u306b\u5fc5\u9808\u3068\u3044\u3046\u8a33\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3053\u308c\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3068\u30a8\u30e9\u30fc\u30ec\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>techscore.com \u3067\u306f\u6b21\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre>_smtp._tls.techscore.com.   IN      TXT     \"v=TLSRPTv1; rua=mailto:sts-reports@techscore.com\"<\/pre>\n<ul>\n<li>\"v\" \u306f \"TLSRPTv1\" \u56fa\u5b9a\u3067\u3059\u3002<\/li>\n<li>\"rua\" \u3067\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4fe1\u5148\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002HTTPS \u306e URI \u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u8a2d\u5b9a\u306e\u78ba\u8a8d<\/h2>\n<p>\u6b63\u3057\u304f\u8a2d\u5b9a\u3067\u304d\u305f\u304b\u3069\u3046\u304b\u306f<a href=\"https:\/\/aykevl.nl\/apps\/mta-sts\/\">MTA-STS validator<\/a>\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2018\/12\/mta-sts-validation-result.png\" rel=\"facebox\" rel=\"attachment wp-att-21882\"><img loading=\"lazy\" src=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2018\/12\/mta-sts-validation-result-300x293.png\" alt=\"\" width=\"300\" height=\"293\" class=\"alignnone size-medium wp-image-21882\" srcset=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2018\/12\/mta-sts-validation-result-300x293.png 300w, https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2018\/12\/mta-sts-validation-result.png 748w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Summary \u306e MTA-STS \u304c OK \u306b\u306a\u3063\u3066\u3044\u306a\u3044\u306e\u306f\u3001mode \u304c \"testing\" \u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3067\u3059\u3002\u305d\u308c\u4ee5\u5916\u306e\u8a2d\u5b9a\u306f\u6b63\u3057\u3044\u3068\u8a3a\u65ad\u3057\u3066\u304f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u4e16\u9593\u306e\u5bfe\u5fdc\u72b6\u6cc1<\/h2>\n<p><a href=\"https:\/\/hstspreload.org\/\">HSTS Preload List<\/a> \u3068\u540c\u69d8\u306b\u3001<a href=\"https:\/\/starttls-everywhere.org\/\">STARTTLS Everywhere<\/a> \u3067 MTA-STS \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306e\u30ea\u30b9\u30c8\u304c\u7ba1\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u30022018\u5e7412\u670821\u65e5\u6642\u70b9\u3067\u306f 214 \u30c9\u30e1\u30a4\u30f3\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u307e\u3059\u3002gmail.com\u3001yahoo.com\u3001hotmail.com\u3001icloud.com\u3001facebook.com \u306a\u3069\u306e\u6709\u540d\u3069\u3053\u308d\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u540d\u3092\u9023\u306d\u3066\u3044\u307e\u3059\u304c\u3001jp \u30c9\u30e1\u30a4\u30f3\u306f\u3072\u3068\u3064\u3060\u3051\u3067\u3057\u305f\u3002\u30ea\u30b9\u30c8\u3078\u306e\u767b\u9332\u306f\u30c9\u30e1\u30a4\u30f3\u6240\u6709\u8005\u304c\u4efb\u610f\u3067\u884c\u3046\u306e\u3067\u3001\u30ea\u30b9\u30c8\u306b\u63b2\u8f09\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c MTA-STA \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u793a\u3059\u8a33\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u65e5\u672c\u3067 MTA-STS \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306f\u5c11\u306a\u305d\u3046\u3067\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u3053\u306e\u30ea\u30b9\u30c8\u306b\u63b2\u8f09\u3055\u308c\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u306e MTA-STS mode \u306f\u3059\u3079\u3066 \"testing\" \u3067\u3057\u305f\u3002\u666e\u53ca\u306f\u3053\u308c\u304b\u3089\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n<h2>\u9001\u4fe1\u5074\u306e\u5bfe\u5fdc\u72b6\u6cc1<\/h2>\n<p>\u53d7\u4fe1\u5074\u3068\u3057\u3066\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306a\u3089\u9001\u4fe1\u5074\u3068\u3057\u3066\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3068\u8003\u3048\u3066 gmail.com\u3001yahoo.com\u3001icloud.com \u306a\u3069\u304b\u3089 techscore.com \u306b\u30e1\u30fc\u30eb\u9001\u4fe1\u3057\u3066\u307f\u307e\u3057\u305f\u3002\u3069\u306e\u9001\u4fe1\u5143\u3082 TLS \u3067\u63a5\u7d9a\u3057\u3066\u304d\u307e\u3057\u305f\u304c\u3001MTA-STS \u30dd\u30ea\u30b7\u30fc\u3092\u53d6\u5f97\u3057\u306b\u306f\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u9001\u4fe1\u5074\u3068\u3057\u3066\u306f MTA-STS \u306b\u5bfe\u5fdc\u3057\u3066\u306a\u3055\u305d\u3046\u3067\u3059\u3002<\/p>\n<p>\u9001\u4fe1\u5074\u3068\u3057\u3066 MTA-STS \u306b\u5bfe\u5fdc\u3059\u308b\u306b\u306f\u4ee5\u4e0b\u306e\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>MTA-STS \u30dd\u30ea\u30b7\u30fc\u306e\u53d6\u5f97\uff08DNS \u304a\u3088\u3073 HTTPS\uff09\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u7ba1\u7406<\/li>\n<li>MX \u30db\u30b9\u30c8\u306e\u691c\u8a3c\uff08\u30db\u30b9\u30c8\u540d\u3001\u8a3c\u660e\u66f8\u306a\u3069\uff09<\/li>\n<li>MTA-STS \u30dd\u30ea\u30b7\u30fc\u306b\u5f93\u3063\u305f\u30e1\u30fc\u30eb\u9001\u4fe1\u5236\u5fa1<\/li>\n<li>\uff08TLSRPT \u306b\u5bfe\u5fdc\u3059\u308b\u306a\u3089\uff09\u30ec\u30dd\u30fc\u30c8\u306e\u9001\u4fe1<\/li>\n<\/ul>\n<p>\u53d7\u4fe1\u5074\u3068\u6bd4\u8f03\u3057\u3066\u9001\u4fe1\u5074\u306f\u5bfe\u5fdc\u306e\u96e3\u6613\u5ea6\u304c\u9ad8\u3044\u305f\u3081\u3001\u5bfe\u5fdc\u304c\u9032\u3093\u3067\u3044\u306a\u3044\u3088\u3046\u3067\u3059\u3002<\/p>\n<p>Postfix \u306e\u516c\u5f0f\u30b5\u30a4\u30c8\u306b\u306f MTA-STS \u306b\u95a2\u3059\u308b\u60c5\u5831\u306f\u3042\u308a\u307e\u305b\u3093\u3002<a href=\"https:\/\/github.com\/Snawoot\/postfix-mta-sts-resolver\">postfix-mta-sts-resolver<\/a> \u3092\u4f7f\u3048\u3070 Postfix \u3092 MTA-STA \u306b\u5bfe\u5fdc\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001MTA-STS \u306e\u30de\u30a4\u30ca\u30fc\u306a\u6a5f\u80fd\u306f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u306a\u3044\u305d\u3046\u3067\u3059\u3002<\/p>\n<h2>\u3055\u3044\u3054\u306b<\/h2>\n<p>2018\u5e7411\u67088\u65e5\u306b\u958b\u50ac\u3055\u308c\u305f <a href=\"https:\/\/meetings.jpaawg.org\/\">JPAAWG 1st General Meeting<\/a> \u306b\u304a\u3044\u3066 <a href=\"https:\/\/www.m3aawg.org\/\">M<sup>3<\/sup>AAWG<\/a> \u304b\u3089\u6765\u3089\u308c\u305f Vice Chairman \u306e\u65b9\u304c\u300c\u6b21\u306f MTA-STS \u306e\u63a8\u9032\u3060\u300d\u3068\u304a\u3063\u3057\u3083\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u30e1\u30fc\u30eb\u306f Web \u3068\u6bd4\u8f03\u3057\u3066 TLS \u304c\u666e\u53ca\u3057\u3066\u3044\u307e\u305b\u3093\u304c\u3001MTA-STS \u306e\u63a8\u9032\u306b\u3088\u3063\u3066\u5b89\u5168\u306b\u30e1\u30fc\u30eb\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u3044\u3044\u3067\u3059\u306d\u3002<\/p>\n<h2>\u53c2\u8003<\/h2>\n<ul>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc8461\">RFC 8461 - SMTP MTA Strict Transport Security (MTA-STS)<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc8460\">RFC 8460 - SMTP TLS Reporting<\/a><\/li>\n<li><a href=\"https:\/\/www.hardenize.com\/blog\/mta-sts\">Introducing MTA Strict Transport Security (MTA-STS)<\/a><\/li>\n<li><a href=\"https:\/\/www.eff.org\/ja\/deeplinks\/2018\/06\/technical-deep-dive-starttls-everywhere\">A Technical Deep Dive into STARTTLS Everywhere<\/a><\/li>\n<li><a href=\"https:\/\/aykevl.nl\/apps\/mta-sts\/\">MTA-STS validator<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3002\u30a4\u30f3\u30d5\u30e9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u672b\u5ee3\u3067\u3059\u3002<br \/>\nTECHSCORE Advent Calendar 2018 22\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<br \/><a href=\"https:\/\/www.techscore.com\/blog\/2018\/12\/22\/mta-sts\/\">\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":22,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[308,18],"tags":[],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/21816"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=21816"}],"version-history":[{"count":54,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/21816\/revisions"}],"predecessor-version":[{"id":21894,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/21816\/revisions\/21894"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=21816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=21816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=21816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}