{"id":10300,"date":"2018-09-04T11:59:26","date_gmt":"2018-09-04T02:59:26","guid":{"rendered":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=10300"},"modified":"2019-03-27T14:19:39","modified_gmt":"2019-03-27T05:19:39","slug":"%e3%83%a1%e3%83%bc%e3%83%ab%e3%81%ae%e6%ad%b4%e5%8f%b2%e3%82%92%e6%8c%af%e3%82%8a%e8%bf%94%e3%82%8b-%e8%aa%95%e7%94%9f%e3%81%8b%e3%82%89%e3%81%93%e3%82%8c%e3%81%be%e3%81%a7","status":"publish","type":"post","link":"https:\/\/sendgrid.kke.co.jp\/blog\/?p=10300","title":{"rendered":"\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u3092\u632f\u308a\u8fd4\u308b &#8211; \u8a95\u751f\u304b\u3089\u3053\u308c\u307e\u3067 &#8211;"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2018\/09\/34337336_S.jpg\" alt=\"34337336 - word e-mail on wall with egyptian alphabet made in 2d software\" width=\"100%\" class=\"aligncenter size-full wp-image-10301\" srcset=\"https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2018\/09\/34337336_S.jpg 450w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2018\/09\/34337336_S-225x150.jpg 225w, https:\/\/sendgrid.kke.co.jp\/blog\/wp\/wp-content\/uploads\/2018\/09\/34337336_S-300x200.jpg 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/p>\n<p>SendGrid\u30b5\u30dd\u30fc\u30c8\u30c1\u30fc\u30e0\u306e\u83ca\u7530\uff08<a href=\"https:\/\/twitter.com\/kikutaro_\" target=\"_blank\">@kikutaro_<\/a>\uff09\u3067\u3059\u3002\u4ee5\u524d\u300c<strong>\u30e1\u30fc\u30eb\u306e\u6b74\u53f2<\/strong>\u300d\u306b\u3064\u3044\u3066\u8abf\u3079\u305f\u3068\u3053\u308d\u3001\u77e5\u3089\u306a\u3044\u3053\u3068\u304c\u305f\u304f\u3055\u3093\u3042\u3063\u3066\u9a5a\u304d\u307e\u3057\u305f\u3002\u666e\u6bb5\u4f55\u6c17\u306a\u304f\u4f7f\u3063\u3066\u3044\u308b\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u306b\u3064\u3044\u3066\u3001\u7686\u3055\u3093\u306f\u3069\u306e\u304f\u3089\u3044\u3054\u5b58\u77e5\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u4eca\u56de\u306f\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u306b\u3064\u3044\u3066\u3001\u3044\u304f\u3064\u304b\u306e\u30c8\u30d4\u30c3\u30af\u306b\u5206\u3051\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3>\u4e16\u754c\u521d\u306e\u30e1\u30fc\u30eb<\/h3>\n<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/History_of_email\" target=\"_blank\">Wikipedia\u306e\u300cHistory of email\u300d<\/a>\u306b\u3088\u308b\u3068\u30011960\u5e74\u4ee3\u306b\u306fTSS(\u30bf\u30a4\u30e0\u30b7\u30a7\u30a2\u30ea\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0)\u4e0a\u3067\u30e6\u30fc\u30b6\u9593\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u4ea4\u63db\u304c\u884c\u308f\u308c\u3066\u304a\u308a\u3001\u30e1\u30fc\u30eb\u306e\u524d\u8eab\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u79c1\u9054\u304c\u666e\u6bb5\u4f7f\u3063\u3066\u3044\u308b<strong>\u300c\uff20\u300d\u4ed8\u304d\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u3063\u305f\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u305f\u306e\u306f1971\u5e74<\/strong>\u3067\u3059\u3002<a href=\"https:\/\/openmap.bbn.com\/~tomlinso\/ray\/home.html\" target=\"_blank\">Ray Tomlinson\u3055\u3093<\/a>\u304c\u8003\u6848\u3057\u3001SNDMSG\u3068\u3044\u3046\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u9001\u4fe1\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u304c\u4e16\u754c\u521d\u306e\u30e1\u30fc\u30eb\u3068\u3044\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u30e1\u30fc\u30eb\u5185\u5bb9\u306f\u300cQWERTYUIOP\u300d\u306e\u3088\u3046\u306a\u610f\u5473\u306e\u306a\u3044\u3082\u306e\u3060\u3063\u305f\u3068\u4e00\u822c\u7684\u306b\u306f\u8a00\u308f\u308c\u3066\u3044\u307e\u3059\u304c\u3001<a href=\"https:\/\/openmap.bbn.com\/~tomlinso\/ray\/mistakes.html\" target=\"_blank\">\u3054\u672c\u4eba\u306f\u899a\u3048\u3066\u304a\u3089\u305a\u66d6\u6627\u306a\u60c5\u5831<\/a>\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u306b\u95a2\u3059\u308bRFC<\/h3>\n<p>\u521d\u7248\u306e\u591a\u304f\u304c1980\u5e74\u4ee3\u306b\u7b56\u5b9a\u3055\u308c\u307e\u3057\u305f\u3002\u65e5\u672c\u56fd\u5185\u3067\u306f1982\u5e74\u306bNEC\u306ePC-9801\u3001\u7fcc1983\u5e74\u306b\u4efb\u5929\u5802\u306e\u30d5\u30a1\u30df\u30b3\u30f3\u304c\u767a\u58f2\u3055\u308c\u305f\u6642\u4ee3\u3067\u3059\u3002<\/p>\n<ul>\n<li>1982\u5e74 <a href=\"https:\/\/tools.ietf.org\/html\/rfc821\" target=\"_blank\">SMTP\uff08RFC 821\uff09<\/a>\u3001<a href=\"https:\/\/tools.ietf.org\/html\/rfc822\" target=\"_blank\">Internet Message Format\u306e\u524d\u8eab\uff08RFC 822\uff09<\/a><\/li>\n<li>1984\u5e74 <a href=\"https:\/\/tools.ietf.org\/html\/rfc918\" target=\"_blank\">POP\uff08RFC 918\uff09<\/a><\/li>\n<li>1988\u5e74 <a href=\"https:\/\/tools.ietf.org\/html\/rfc1064\" target=\"_blank\">IMAP\uff08RFC 1064\uff09<\/a>\u3001<a href=\"https:\/\/tools.ietf.org\/html\/rfc1081\" target=\"_blank\">POP3\uff08RFC 1081\uff09<\/a><\/li>\n<li>1992\u5e74 <a href=\"https:\/\/tools.ietf.org\/html\/rfc1341\" target=\"_blank\">MIME\uff08RFC 1341\uff09<\/a><\/li>\n<\/ul>\n<p>\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306f\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u306e\u4e2d\u3067\u306f\u6bd4\u8f03\u7684\u65b0\u3057\u304f\u30012006\u5e74\u306b<a href=\"https:\/\/tools.ietf.org\/html\/rfc4408\" target=\"_blank\">SPF\uff08RFC 4408\uff09<\/a>\u30012007\u5e74\u306b<a href=\"https:\/\/tools.ietf.org\/html\/rfc4871\" target=\"_blank\">DKIM\uff08RFC 4871\uff09<\/a>\u304c\u7b56\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u4e16\u754c\u521d\u306e\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb<\/h3>\n<p>\u30e1\u30fc\u30eb\u306e\u4e16\u754c\u3067\u6614\u3082\u4eca\u3082\u5909\u308f\u3089\u306a\u3044\u554f\u984c\u304c\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u3067\u3059\u3002<strong>\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u304c\u4e16\u754c\u3067\u521d\u3081\u3066\u9001\u4fe1\u3055\u308c\u305f\u306e\u306f1978\u5e74\u3067\u3001\u5f53\u6642DEC\u793e\u306b\u52e4\u3081\u3066\u3044\u305f<a href=\"https:\/\/moosend.com\/blog\/gary-thuerk-people-make-the-same-mistakes-over-and-over-again\/\" target=\"_blank\">Gary Thuerk\u3055\u3093<\/a>\u304c397\u540d\u306e\u5b9b\u5148\u306b\u9001\u4fe1<\/strong>\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u304c\u304d\u3063\u304b\u3051\u3068\u306a\u308a\u3001Gary\u3055\u3093\u306f\u300cThe Father of Spam\u300d\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u65e5\u672c\u8a9e\u306e\u30e1\u30fc\u30eb<\/h3>\n<p>\u30e1\u30fc\u30eb\u306f\u5143\u30057bit\u306eASCII\u3092\u524d\u63d0\u306b\u8a2d\u8a08\u3055\u308c\u305f\u305f\u3081\u3001\u65e5\u672c\u8a9e\u306e\u9001\u4fe1\u306b\u306f\u8ab2\u984c\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u305d\u3053\u3067\u3001\u65e5\u672c\u8a9e\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u306f\u56fd\u5185\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u5148\u99c6\u3051\u3067\u3042\u308bJUNET\u3067\u958b\u767a\u3055\u308c\u305f\u300cJUNET \u30b3\u30fc\u30c9\u300d\u3092\u4f7f\u3044\u3001\u3053\u308c\u3092\u5143\u306b\u300c ISO-2022-JP\u300d\u304c\u4f5c\u3089\u308c\u307e\u3057\u305f\u3002ISO-2022-JP\u306f1993\u5e74\u306b<a href=\"https:\/\/tools.ietf.org\/html\/rfc1468\" target=\"_blank\">RFC1468<\/a>\u3068\u3057\u3066\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u65e5\u672c\u8a9e\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u306f\u4eca\u3082ISO-2022-JP\u304c\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3059\u304c\u3001\u6700\u8fd1\u306fUTF-8\u306e\u5229\u7528\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8<\/h3>\n<p>\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u4e00\u8a00\u3067\u3044\u3063\u3066\u3082\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u4f7f\u3048\u308bWeb\u30e1\u30fc\u30eb\u307e\u3067\u69d8\u3005\u306a\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u6b74\u53f2\u7684\u306b\u300c\u3053\u308c\u304c\u6700\u521d\u300d\u3068\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u307f\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f<a href=\"https:\/\/en.wikipedia.org\/wiki\/Comparison_of_email_clients\" target=\"_blank\">1986\u5e74\u306bElm<\/a>\u3001Web\u30e1\u30fc\u30eb\u306f<a href=\"https:\/\/en.wikipedia.org\/wiki\/Comparison_of_webmail_providers\" target=\"_blank\">1993\u5e74\u306bAOL Mail<\/a>\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3001\u305d\u308c\u305e\u308c\u304b\u306a\u308a\u521d\u671f\u304b\u3089\u3042\u3063\u305f\u3088\u3046\u3067\u3059\u3002<\/p>\n<p>\u4f59\u8ac7\u3067\u3059\u304c\u3001\u73fe\u5728\u591a\u304f\u306e\u65b9\u304c\u5229\u7528\u3057\u3066\u3044\u308bGmail\u306e\u6b74\u53f2\u3092\u8fbf\u3063\u3066\u307f\u308b\u3068\u3001\u6700\u521d\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u306e\u306f2004\u5e74\u306e4\u67081\u65e5\u3067\u3057\u305f\u3002\u7121\u6599\u3067\u4f7f\u3048\u308b\u4e0a\u3001\u4fdd\u5b58\u5bb9\u91cf\u304c1GB\u3068\u4ed6\u793e\u306b\u6bd4\u3079\u3066\u5927\u5bb9\u91cf\u3067\u3042\u3063\u305f\u305f\u3081\u3001<a href=\"https:\/\/gigazine.net\/news\/20140402-gmail-10-years\/\" target=\"_blank\">\u5f53\u6642\u306f\u30a8\u30a4\u30d7\u30ea\u30eb\u30d5\u30fc\u30eb\u306e\u30cd\u30bf\u3068\u3082\u601d\u308f\u308c\u305f<\/a>\u305d\u3046\u3067\u3059\u3002<\/p>\n<h3>2018\u5e74\u306b\u304a\u3051\u308b\u30e1\u30fc\u30eb\u306e\u73fe\u72b6<\/h3>\n<p>2018\u5e74\u73fe\u5728\u3001\u30e1\u30fc\u30eb\u306e\u30e6\u30fc\u30b6\u6570\u306f\u7d0438\u5104\u4eba\u3067\u30011\u65e5\u306b\u9001\u4fe1\u3055\u308c\u308b\u30e1\u30fc\u30eb\u306f2,800\u5104\u901a\u3082\u3042\u308b\u305d\u3046\u3067\u3059\u3002\uff08Radicati Group, Inc.\u306eEmail Statistics Report\u3088\u308a\uff09\u6700\u521d\u306e\u30e1\u30fc\u30eb\u304c\u9001\u3089\u308c\u3066\u304b\u308940\u5e74\u4ee5\u4e0a\u304c\u7d4c\u3061\u307e\u3059\u304c\u3001\u30e1\u30fc\u30eb\u304c\u3044\u304b\u306b\u591a\u304f\u306e\u4eba\u306b\u5229\u7528\u3055\u308c\u308b\u30c4\u30fc\u30eb\u3067\u3042\u308b\u304b\u3001\u3053\u306e\u6570\u5024\u304b\u3089\u3088\u304f\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<h3>\u304a\u308f\u308a\u306b<\/h3>\n<p>\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u306b\u3064\u3044\u3066\u3001\u7686\u3055\u3093\u306f\u3069\u306e\u304f\u3089\u3044\u3054\u5b58\u77e5\u3060\u3063\u305f\u3067\u3057\u3087\u3046\u304b\uff1f\u6642\u4ee3\u3068\u5171\u306b\u65b0\u3057\u3044\u30c4\u30fc\u30eb\u304c\u53f0\u982d\u3057\u3001\u6700\u8fd1\u3067\u306f\u300c\u30e1\u30fc\u30eb\u306f\u53e4\u3044\u300d\u3068\u8a00\u308f\u308c\u308b\u6a5f\u4f1a\u3082\u5897\u3048\u3066\u304d\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001SendGrid\u304c\u9001\u4fe1\u3059\u308b\u30e1\u30fc\u30eb\u306e\u901a\u6570\u306f\u3001\u5275\u696d\u3057\u305f2009\u5e74\u304b\u3089<a href=\"https:\/\/sendgrid.kke.co.jp\/blog\/?p=7756\" target=\"_Blank\">\u5897\u3048\u7d9a\u3051\u3066\u3044\u307e\u3059<\/a>\u3002\u6b74\u53f2\u306e\u6d41\u308c\u3068\u3068\u3082\u306b\u3001\u30e1\u30fc\u30eb\u306e\u4f7f\u308f\u308c\u65b9\u3082\u5909\u5316\u3057\u3001\u30c7\u30b8\u30bf\u30ebID\u3068\u3057\u3066\u306e\u91cd\u8981\u6027\u3084\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30c4\u30fc\u30eb\u3068\u3057\u3066\u306e\u9700\u8981\u304c\u5897\u3057\u3066\u3044\u307e\u3059\u3002\u4eca\u5f8c\u3069\u306e\u3088\u3046\u306a\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u304c\u4f5c\u3089\u308c\u3066\u3044\u304f\u306e\u304b\u3001SendGrid\u306e\u4e2d\u304b\u3089\u307f\u3066\u3044\u304f\u306e\u304c\u697d\u3057\u307f\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SendGrid\u30b5\u30dd\u30fc\u30c8\u30c1\u30fc\u30e0\u306e\u83ca\u7530\uff08@kikutaro_\uff09\u3067\u3059\u3002\u4ee5\u524d\u300c\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u300d\u306b\u3064\u3044\u3066\u8abf\u3079\u305f\u3068\u3053\u308d\u3001\u77e5\u3089\u306a\u3044\u3053\u3068\u304c\u305f\u304f\u3055\u3093\u3042\u3063\u3066\u9a5a\u304d\u307e\u3057\u305f\u3002\u666e\u6bb5\u4f55\u6c17\u306a\u304f\u4f7f\u3063\u3066\u3044\u308b\u30e1\u30fc\u30eb\u306e\u6b74\u53f2\u306b\u3064\u3044\u3066\u3001\u7686\u3055\u3093\u306f\u3069\u306e\u304f\u3089\u3044\u3054\u5b58\u77e5\u3067\u3057 <a class=\"read-more\" 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