{"id":18162,"date":"2025-03-28T11:51:34","date_gmt":"2025-03-28T02:51:34","guid":{"rendered":"https:\/\/blastmail.jp\/blog\/?p=18162"},"modified":"2025-12-24T13:50:30","modified_gmt":"2025-12-24T04:50:30","slug":"mail-server-error","status":"publish","type":"post","link":"https:\/\/blastmail.jp\/blog\/mail\/mail-server-error","title":{"rendered":"\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\uff5c\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3068\u89e3\u6c7a\u7b56\u3092\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2025\/03\/mail-server-error.jpg\" alt=\"\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\uff5c\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3068\u89e3\u6c7a\u7b56\u3092\u5fb9\u5e95\u89e3\u8aac\u3000\u306e\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u753b\u50cf\" width=\"1200\" height=\"628\" class=\"alignnone size-full wp-image-18165\" 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decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2025\/03\/26439_728_90.png\" alt=\"blastengine_728_90\" width=\"728\" height=\"90\" class=\"alignnone size-full wp-image-18153\" \/><\/p>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3068\u306f<\/h2>\n<p>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3068\u306f\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1\u3092\u884c\u3046\u305f\u3081\u306b\u6b20\u304b\u305b\u306a\u3044\u30b5\u30fc\u30d0\u30fc\u306e\u3053\u3068\u3067\u3059\u3002\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u6642\u3084\u53d7\u4fe1\u6642\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u7570\u306a\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u9023\u643a\u3057\u3066\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e07\u304c\u4e00\u3001\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u306b\u4e0d\u5099\u304c\u3042\u308b\u3068\u30e1\u30fc\u30eb\u304c\u76f8\u624b\u306b\u5c4a\u304b\u306a\u304b\u3063\u305f\u308a\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u5224\u65ad\u3055\u308c\u305f\u308a\u3059\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4fe1\u983c\u6027\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u914d\u616e\u3057\u3064\u3064\u6b63\u3057\u304f\u8a2d\u5b9a\u30fb\u904b\u7528\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<\/p>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u7a2e\u985e<\/h2>\n<p>\u30e1\u30fc\u30eb\u3092\u9001\u53d7\u4fe1\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u4e3b\u306b\u4ee5\u4e0b\u306e3\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>SMTP\u30b5\u30fc\u30d0\u30fc<\/li>\n<li>POP\u30b5\u30fc\u30d0\u30fc<\/li>\n<li>IMAP\u30b5\u30fc\u30d0\u30fc<\/div><\/li>\n<\/ul>\n<p>\u305d\u308c\u305e\u308c\u306e\u5f79\u5272\u3084\u7279\u5fb4\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>SMTP\u30b5\u30fc\u30d0\u30fc<\/h3>\n<p>SMTP\u3068\u306f\u300cSimple Mail Transfer Protocol\u300d\u306e\u7565\u3067\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u969b\u306b\u4f7f\u308f\u308c\u308b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002SMTP\u30b5\u30fc\u30d0\u30fc\u306f\u9001\u4fe1\u3059\u308b\u30e1\u30fc\u30eb\u3092\u76f8\u624b\u5074\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5c4a\u3051\u308b\u5f79\u5272\u3092\u62c5\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3068\u304d\u3001\u5b9b\u5148\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306bDNS\u30b5\u30fc\u30d0\u30fc\u306bIP\u30a2\u30c9\u30ec\u30b9\u306e\u554f\u3044\u5408\u308f\u305b\u3082\u884c\u3044\u307e\u3059\u3002\u306a\u304a\u3001DNS\u30b5\u30fc\u30d0\u30fc\u81ea\u4f53\u306f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u9001\u4fe1\u5148\u3092\u7279\u5b9a\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u60aa\u610f\u306e\u3042\u308b\u7b2c\u4e09\u8005\u306b\u3088\u308b\u4e0d\u6b63\u5229\u7528\uff08\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u9001\u4fe1\uff09\u3092\u9632\u3050\u305f\u3081\u3001\u591a\u304f\u306e\u56fd\u5185\u30d7\u30ed\u30d0\u30a4\u30c0\u3067\u306fSMTP\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u30a2\u30af\u30bb\u30b9\u5236\u9650\u304c\u8a2d\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>POP\u30b5\u30fc\u30d0\u30fc<\/h3>\n<p>POP\u30b5\u30fc\u30d0\u30fc\u306f\u300cPost Office Protocol\u300d\u306e\u7565\u3067\u30e1\u30fc\u30eb\u306e\u53d7\u4fe1\u3092\u884c\u3046\u30b5\u30fc\u30d0\u30fc\u3067\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u306eID\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f7f\u3063\u3066\u8a8d\u8a3c\u3092\u884c\u3044\u3001\u6210\u529f\u3059\u308c\u3070\u53d7\u4fe1\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002\u53d7\u4fe1\u3057\u305f\u30e1\u30fc\u30eb\u306f\u7aef\u672b\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u308b\u305f\u3081\u3001\u305d\u306e\u5f8c\u306f\u30aa\u30d5\u30e9\u30a4\u30f3\u3067\u3082\u95b2\u89a7\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<div class=\"box01\"><span class=\"box-title\">POP\u30b5\u30fc\u30d0\u30fc\u306e\u30e1\u30ea\u30c3\u30c8<\/span>\n<ul>\n<li>\u30e1\u30fc\u30eb\u3092\u7aef\u672b\u306b\u4fdd\u5b58\u3059\u308b\u305f\u3081\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u5bb9\u91cf\u3092\u7bc0\u7d04\u3067\u304d\u308b<\/li>\n<li>\u30aa\u30d5\u30e9\u30a4\u30f3\u74b0\u5883\u3067\u3082\u30e1\u30fc\u30eb\u304c\u8aad\u3081\u308b<\/div><\/li>\n<\/ul>\n<div class=\"box01\"><span class=\"box-title\">POP\u30b5\u30fc\u30d0\u30fc\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/span>\n<ul>\n<li>\u53d7\u4fe1\u3057\u305f\u7aef\u672b\u4ee5\u5916\u3067\u306f\u30e1\u30fc\u30eb\u3092\u78ba\u8a8d\u3067\u304d\u306a\u3044<\/li>\n<li>\u8907\u6570\u7aef\u672b\u3067\u306e\u5229\u7528\u6642\u306f\u540c\u671f\u306e\u624b\u9593\u304c\u304b\u304b\u308b<\/div><\/li>\n<\/ul>\n<div class=\"box01\"><span class=\"box-title\">POP\u304c\u9069\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9<\/span>\n<ul>\n<li>\u4f1a\u793e\u306e\u30d1\u30bd\u30b3\u30f31\u53f0\u3067\u30e1\u30fc\u30eb\u3092\u7ba1\u7406\u3059\u308b\u5834\u5408<\/li>\n<li>\u30aa\u30d5\u30e9\u30a4\u30f3\u3084\u901a\u4fe1\u304c\u4e0d\u5b89\u5b9a\u306a\u74b0\u5883\u3067\u3082\u30e1\u30fc\u30eb\u3092\u78ba\u8a8d\u3057\u305f\u3044\u3068\u304d<\/li>\n<li>\u30b5\u30fc\u30d0\u30fc\u5bb9\u91cf\u306b\u5236\u9650\u304c\u3042\u308b\u3068\u304d<\/div><\/li>\n<\/ul>\n<h3>IMAP\u30b5\u30fc\u30d0\u30fc<\/h3>\n<p>IMAP\u306f\u300cInternet Message Access Protocol\u300d\u306e\u7565\u3067POP\u3068\u540c\u69d8\u306b\u30e1\u30fc\u30eb\u306e\u53d7\u4fe1\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u304c\u3001\u4ed5\u7d44\u307f\u306f\u7570\u306a\u308a\u307e\u3059\u3002IMAP\u3067\u306f\u30e1\u30fc\u30eb\u3092\u7aef\u672b\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u305b\u305a\u306b\u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u7ba1\u7406\u3059\u308b\u305f\u3081\u30b9\u30c8\u30ec\u30fc\u30b8\u5bb9\u91cf\u3092\u6d88\u8cbb\u305b\u305a\u306b\u6e08\u307f\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u304c\u5fc5\u9808\u3067\u30aa\u30d5\u30e9\u30a4\u30f3\u3067\u306f\u30e1\u30fc\u30eb\u3092\u95b2\u89a7\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<div class=\"box01\"><span class=\"box-title\">IMAP\u304c\u9069\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9<\/span>\n<ul>\n<li>\u8907\u6570\u306e\u7aef\u672b\u304b\u3089\u540c\u3058\u30e1\u30fc\u30eb\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u5229\u7528\u3057\u305f\u3044\u5834\u5408<\/li>\n<li>\u5916\u51fa\u5148\u3084\u8907\u6570\u62e0\u70b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u5834\u5408<\/li>\n<li>\u30c1\u30fc\u30e0\u3067\u5171\u6709\u3067\u304d\u308b\u30e1\u30fc\u30eb\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u5229\u7528\u3057\u305f\u3044\u5834\u5408<\/li>\n<li>\u30e1\u30fc\u30eb\u306e\u7d1b\u5931\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u3057\u305f\u3044\u5834\u5408<\/div><\/li>\n<\/ul>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u4ed5\u7d44\u307f<\/h2>\n<p>\u30e1\u30fc\u30eb\u306f\u9001\u4fe1\u8005\u304b\u3089\u53d7\u4fe1\u8005\u3078\u30c0\u30a4\u30ec\u30af\u30c8\u306b\u5c4a\u304f\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5b9f\u969b\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u30b5\u30fc\u30d0\u30fc\u3092\u7d4c\u7531\u3057\u3066\u5c4a\u3051\u3089\u308c\u308b\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u30b5\u30fc\u30d0\u30fc\u304c\u3069\u306e\u3088\u3046\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u308b\u306e\u304b\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>SMTP\u30b5\u30fc\u30d0\u30fc<\/h3>\n<p>\u307e\u305a\u3001\u9001\u4fe1\u8005\u304c\u30e1\u30fc\u30eb\u3092\u9001\u308b\u3068\u3001\u30e1\u30fc\u30eb\u30bd\u30d5\u30c8\u306fSMTP\u30b5\u30fc\u30d0\u30fc\u306b\u300c\u3053\u306e\u30e1\u30fc\u30eb\u3092\u9001\u3063\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u4f9d\u983c\u3057\u307e\u3059\u3002\u4f9d\u983c\u3092\u53d7\u3051\u305fSMTP\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u5b9b\u5148\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u5c5e\u3059\u308b\u30c9\u30e1\u30a4\u30f3\u3092\u78ba\u8a8d\u3057\u76f8\u624b\u5074\u306eSMTP\u30b5\u30fc\u30d0\u30fc\u306b\u30e1\u30fc\u30eb\u3092\u8ee2\u9001\u3057\u307e\u3059\u3002<\/p>\n<h3>DNS\u30b5\u30fc\u30d0\u30fc<\/h3>\n<p>SMTP\u30b5\u30fc\u30d0\u30fc\u304c\u76f8\u624b\u5148\u306b\u30e1\u30fc\u30eb\u3092\u5c4a\u3051\u308b\u305f\u3081\u306b\u306f\u5b9b\u5148\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u7279\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u6d3b\u8e8d\u3059\u308b\u306e\u304cDNS\u30b5\u30fc\u30d0\u30fc\u3067\u3059\u3002<\/p>\n<p>SMTP\u30b5\u30fc\u30d0\u30fc\u306f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u300c\uff20\u300d\u4ee5\u964d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u3082\u3068\u306b\u3001\u300c\u3053\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u3069\u3053\uff1f\u300d\u3068DNS\u30b5\u30fc\u30d0\u30fc\u306b\u554f\u3044\u5408\u308f\u305b\u3066\u76f8\u624b\u5148\u306eSMTP\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<h3>POP\u30b5\u30fc\u30d0\u30fc\u307e\u305f\u306fIMAP\u30b5\u30fc\u30d0\u30fc<\/h3>\n<p>\u76f8\u624b\u306eSMTP\u30b5\u30fc\u30d0\u30fc\u306b\u7121\u4e8b\u30e1\u30fc\u30eb\u304c\u5c4a\u304f\u3068\u3001\u305d\u306e\u30e1\u30fc\u30eb\u306f\u4e00\u65e6\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u4fdd\u7ba1\u3055\u308c\u307e\u3059\u3002\u53d7\u4fe1\u8005\u304c\u30e1\u30fc\u30eb\u3092\u8aad\u3080\u305f\u3081\u306b\u306fPOP\u30b5\u30fc\u30d0\u30fc\u307e\u305f\u306fIMAP\u30b5\u30fc\u30d0\u30fc\u3092\u901a\u3058\u3066\u3001\u305d\u306e\u30e1\u30fc\u30eb\u3092\u53d6\u308a\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>POP\u30b5\u30fc\u30d0\u30fc<\/strong>\uff1a\u30e1\u30fc\u30eb\u3092\u7aef\u672b\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u4fdd\u5b58\u3059\u308b\uff08\u30aa\u30d5\u30e9\u30a4\u30f3\u3067\u3082\u95b2\u89a7\u53ef\u80fd\uff09<\/li>\n<li><strong>IMAP\u30b5\u30fc\u30d0\u30fc<\/strong>\uff1a\u30e1\u30fc\u30eb\u3092\u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u7ba1\u7406\u3057\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u72b6\u614b\u3067\u95b2\u89a7\u3059\u308b\uff08\u8907\u6570\u7aef\u672b\u3067\u306e\u5229\u7528\u306b\u4fbf\u5229\uff09<\/div><\/li>\n<\/ul>\n<h2>\u30e1\u30fc\u30eb\u9001\u53d7\u4fe1\u306e\u6d41\u308c<\/h2>\n<p>\u30e1\u30fc\u30eb\u306e\u3084\u308a\u53d6\u308a\u306e\u6d41\u308c\u3092\u3001\u624b\u7d19\u306e\u90f5\u9001\u306b\u4f8b\u3048\u308b\u3068\u30a4\u30e1\u30fc\u30b8\u3057\u3084\u3059\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u3001\u3042\u306a\u305f\u304c\u624b\u7d19\uff08\u30e1\u30fc\u30eb\uff09\u3092\u51fa\u3059\u3068\u3001\u6700\u521d\u306b\u6700\u5bc4\u308a\u306e\u90f5\u4fbf\u5c40\uff08SMTP\u30b5\u30fc\u30d0\u30fc\uff09\u306b\u9810\u3051\u307e\u3059\u3002\u90f5\u4fbf\u5c40\u306f\u5b9b\u5148\u306e\u4f4f\u6240\uff08\u30c9\u30e1\u30a4\u30f3\u540d\uff09\u306b\u57fa\u3065\u3044\u3066\u3001\u6b63\u78ba\u306a\u4f4f\u6240\uff08IP\u30a2\u30c9\u30ec\u30b9\uff09\u3092\u90f5\u4fbf\u756a\u53f7\u691c\u7d22\uff08DNS\u30b5\u30fc\u30d0\u30fc\uff09\u3067\u8abf\u3079\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u5b9b\u5148\u306b\u8fd1\u3044\u90f5\u4fbf\u5c40\uff08\u53d7\u4fe1\u5074SMTP\u30b5\u30fc\u30d0\u30fc\uff09\u306b\u624b\u7d19\u304c\u8ee2\u9001\u3055\u308c\u3001\u6700\u7d42\u7684\u306b\u53d7\u53d6\u4eba\u304c\u81ea\u5b85\u3067\u624b\u7d19\u3092\u8aad\u3080\uff08POP\u3084IMAP\u3067\u30e1\u30fc\u30eb\u3092\u53d7\u4fe1\uff09\u3068\u3044\u3046\u6d41\u308c\u3067\u3059\u3002\u30e1\u30fc\u30eb\u9001\u53d7\u4fe1\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u9001\u4fe1\u8005\u304c\u30e1\u30fc\u30eb\u3092\u9001\u308b<\/li>\n<li>\u30e1\u30fc\u30eb\u306f\u9001\u4fe1\u8005\u306eSMTP\u30b5\u30fc\u30d0\u30fc\u306b\u9001\u3089\u308c\u308b<\/li>\n<li>SMTP\u30b5\u30fc\u30d0\u30fc\u304cDNS\u30b5\u30fc\u30d0\u30fc\u306b\u5b9b\u5148\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u554f\u3044\u5408\u308f\u305b\u308b<\/li>\n<li>DNS\u30b5\u30fc\u30d0\u30fc\u304c\u8abf\u67fb\u3057\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092\u8fd4\u3059<\/li>\n<li>\u9001\u4fe1\u8005\u306eSMTP\u30b5\u30fc\u30d0\u30fc\u304c\u3001\u76f8\u624b\u306eSMTP\u30b5\u30fc\u30d0\u30fc\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b<\/li>\n<li>\u30e1\u30fc\u30eb\u306f\u53d7\u4fe1\u8005\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u4fdd\u7ba1\u3055\u308c\u3001POP\u307e\u305f\u306fIMAP\u30b5\u30fc\u30d0\u30fc\u3092\u901a\u3058\u3066\u53d7\u4fe1\u8005\u304c\u95b2\u89a7\u3059\u308b<\/div><\/li>\n<\/ul>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u306e\u4ee3\u8868\u4f8b\u3068\u305d\u306e\u5bfe\u51e6\u65b9\u6cd5<\/h2>\n<p>\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u3044\u3068\u304d\u306f\u4f55\u3089\u304b\u306e\u30a8\u30e9\u30fc\u304c\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3067\u767a\u751f\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3093\u306a\u3068\u304d\u306f\u7126\u3089\u305a\u3001\u307e\u305a\u306f\u30a8\u30e9\u30fc\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u3066\u539f\u56e0\u3092\u7279\u5b9a\u3057\u843d\u3061\u7740\u3044\u3066\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<\/p>\n<p>\u591a\u304f\u306e\u5834\u5408\u3001\u30a8\u30e9\u30fc\u306f\u300c\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u300d\u3068\u547c\u3070\u308c\u308b3\u6841\u306e\u6570\u5b57\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3092\u624b\u304c\u304b\u308a\u306b\u539f\u56e0\u3084\u5bfe\u51e6\u6cd5\u3092\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u7279\u306b\u767a\u751f\u983b\u5ea6\u306e\u9ad8\u3044\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u30925\u3064\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3>550\u30a8\u30e9\u30fc<\/h3>\n<p>\u5b9b\u5148\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u5b58\u5728\u3057\u306a\u3044\u3001\u307e\u305f\u306f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u3068\u304d\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li><strong>550 Host Unknown<\/strong>\uff1a\uff20\u4ee5\u964d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u8aa4\u3063\u3066\u304a\u308a\u3001\u5b9b\u5148\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u7279\u5b9a\u3067\u304d\u306a\u3044<\/li>\n<li><strong>550 User Unknown<\/strong>\uff1a\uff20\u306e\u524d\u306e\u30e6\u30fc\u30b6\u30fc\u540d\u304c\u5b58\u5728\u3057\u306a\u3044\u3001\u307e\u305f\u306f\u9593\u9055\u3063\u3066\u3044\u308b<\/div><\/li>\n<\/ul>\n<p>\u9001\u4fe1\u5148\u306e\u30a2\u30c9\u30ec\u30b9\u306b\u5165\u529b\u30df\u30b9\u304c\u306a\u3044\u304b\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u7db4\u308a\u3092\u542b\u3081\u3066\u3082\u3046\u4e00\u5ea6\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>551\u30a8\u30e9\u30fc<\/h3>\n<p>\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u7121\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3067\u767a\u751f\u3057\u307e\u3059\u3002\u9001\u4fe1\u5148\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u305d\u306e\u30a2\u30c9\u30ec\u30b9\u306e\u53d7\u4fe1\u3092\u62d2\u5426\u3057\u3066\u3044\u308b\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u76f8\u624b\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u73fe\u5728\u3082\u6709\u52b9\u304b\u3001\u307e\u305f\u306f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u5951\u7d04\u72b6\u6cc1\u306b\u554f\u984c\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>552\u30a8\u30e9\u30fc<\/h3>\n<p>\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u5bb9\u91cf\u30aa\u30fc\u30d0\u30fc\u3001\u307e\u305f\u306f\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u304c\u5927\u304d\u3059\u304e\u308b\u5834\u5408\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u5927\u304d\u306aPDF\u30d5\u30a1\u30a4\u30eb\u3084\u9ad8\u89e3\u50cf\u5ea6\u306e\u753b\u50cf\u3092\u6dfb\u4ed8\u3057\u3066\u3044\u308b\u3068\u3001\u3053\u306e\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5bfe\u51e6\u6cd5\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u8efd\u304f\u3059\u308b\uff08\u5727\u7e2e\u30fb\u5206\u5272\u306a\u3069\uff09<\/li>\n<li>\u30af\u30e9\u30a6\u30c9\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u5171\u6709\u30ea\u30f3\u30af\u306b\u5207\u308a\u66ff\u3048\u308b<\/li>\n<li>\u53d7\u4fe1\u8005\u306b\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306e\u5bb9\u91cf\u3092\u7a7a\u3051\u3066\u3082\u3089\u3046<\/div><\/li>\n<\/ul>\n<h3>553\u30a8\u30e9\u30fc<\/h3>\n<p>\u9001\u4fe1\u5148\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306b\u62d2\u5426\u3055\u308c\u305f\u5834\u5408\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u3067\u3059\u3002\u4e3b\u306a\u539f\u56e0\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u9001\u4fe1\u5143\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u304c\u4e0d\u6b63\u307e\u305f\u306f\u5b58\u5728\u3057\u306a\u3044<\/li>\n<li>SMTP\u8a8d\u8a3c\u3092\u3057\u3066\u3044\u306a\u3044<\/li>\n<li>\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u3068\u5224\u65ad\u3055\u308c\u3066\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b<\/div><\/li>\n<\/ul>\n<p>\u3053\u306e\u5834\u5408\u306fSMTP\u8a8d\u8a3c\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3001\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u306e\u8a2d\u5b9a\u3084\u9001\u4fe1\u5185\u5bb9\u304c\u9069\u5207\u304b\u898b\u76f4\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>554\u30a8\u30e9\u30fc<\/h3>\n<p>\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u306b\u5931\u6557\u3057\u305f\u3053\u3068\u3092\u793a\u3059\u30a8\u30e9\u30fc\u3067\u539f\u56e0\u306f\u3055\u307e\u3056\u307e\u3067\u3059\u3002\u5b9b\u5148\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u304c\u4e00\u6642\u7684\u306b\u30c0\u30a6\u30f3\u3057\u3066\u3044\u308b\u3001\u8ee2\u9001\u30b5\u30fc\u30d3\u30b9\u306e\u4e0d\u5177\u5408\u3001\u53d7\u4fe1\u5074\u306e\u8ff7\u60d1\u30e1\u30fc\u30eb\u5bfe\u7b56\u306a\u3069\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306f\u8868\u793a\u3055\u308c\u305f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u3088\u304f\u8aad\u307f\u3001\u53ef\u80fd\u3067\u3042\u308c\u3070\u9001\u4fe1\u5148\u306b\u30b5\u30fc\u30d0\u30fc\u306e\u7a3c\u50cd\u72b6\u6cc1\u3084\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u3066\u3082\u3089\u3044\u307e\u3057\u3087\u3046\u3002\u6642\u9593\u3092\u304a\u3044\u3066\u518d\u9001\u3059\u308b\u306e\u3082\u3072\u3068\u3064\u306e\u624b\u3067\u3059\u3002<\/p>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h2>\n<p>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u500b\u4eba\u3067\u8a2d\u5b9a\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u3055\u307e\u3056\u307e\u306a\u4f5c\u696d\u3084\u5c02\u9580\u7684\u306a\u77e5\u8b58\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u30e1\u30fc\u30eb\u306e\u4ed5\u7d44\u307f\u306b\u8a73\u3057\u304f\u306a\u3044\u5834\u5408\u3001\u8a2d\u5b9a\u306e\u9014\u4e2d\u3067\u3064\u307e\u305a\u3044\u3066\u3057\u307e\u3046\u3053\u3068\u3082\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u500b\u4eba\u3067\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4f5c\u696d\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u56de\u7dda\u306e\u5951\u7d04<\/li>\n<li>\u30eb\u30fc\u30bf\u30fc\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306e\u8a2d\u7f6e<\/li>\n<li>\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u306e\u53d6\u5f97<\/li>\n<li>DNS\u30ec\u30b3\u30fc\u30c9\u306e\u8a2d\u5b9a<\/li>\n<li>\u96fb\u5b50\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u8a2d\u5b9a<\/li>\n<li>\u30e1\u30fc\u30ea\u30f3\u30b0\u30ea\u30b9\u30c8\u306a\u3069\u306e\u8ffd\u52a0\u6a5f\u80fd\u306e\u5c0e\u5165<\/div><\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306b\u624b\u9806\u304c\u591a\u304f\u8a2d\u5b9a\u30df\u30b9\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3082\u3042\u308b\u305f\u3081\u3001\u6280\u8853\u306b\u81ea\u4fe1\u304c\u3042\u308b\u5834\u5408\u3092\u9664\u304d\u3001\u7121\u7406\u306b\u500b\u4eba\u3067\u884c\u3046\u3088\u308a\u3082\u5c02\u9580\u306e\u904b\u55b6\u4f1a\u793e\u304c\u63d0\u4f9b\u3059\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u767a\u884c\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002Gmail\u3084Yahoo!\u30e1\u30fc\u30eb\u3068\u3044\u3063\u305f\u30d5\u30ea\u30fc\u30e1\u30fc\u30eb\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u30d3\u30b8\u30cd\u30b9\u7528\u9014\u3068\u3057\u3066\u306f\u4fe1\u983c\u6027\u3084\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u306e\u89b3\u70b9\u304b\u3089\u3042\u307e\u308a\u5411\u3044\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\uff08example.com\u306a\u3069\uff09\u3092\u53d6\u5f97\u3057\u3001\u305d\u308c\u3092\u4f7f\u3063\u305f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\uff08info@example.com \u306a\u3069\uff09\u3092\u5229\u7528\u3059\u308c\u3070\u3001\u4f01\u696d\u3084\u56e3\u4f53\u3068\u3057\u3066\u306e\u4fe1\u983c\u611f\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u8a2d\u5b9a\u3059\u308b\u969b\u306b\u306f\u3001\u5229\u7528\u3059\u308b\u30ec\u30f3\u30bf\u30eb\u30b5\u30fc\u30d0\u30fc\u3084\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u8a2d\u5b9a\u65b9\u6cd5\u3084\u7533\u3057\u8fbc\u307f\u624b\u9806\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u3054\u3068\u306e\u30de\u30cb\u30e5\u30a2\u30eb\u3084\u30b5\u30dd\u30fc\u30c8\u3092\u78ba\u8a8d\u3057\u306a\u304c\u3089\u9032\u3081\u308b\u3068\u30b9\u30e0\u30fc\u30ba\u3067\u3059\u3002\u4f55\u304b\u30c8\u30e9\u30d6\u30eb\u304c\u8d77\u304d\u305f\u3068\u304d\u306b\u5099\u3048\u3066\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3082\u5fd8\u308c\u305a\u306b\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u304c\u53ca\u307c\u3059\u5f71\u97ff\u3068\u306f\uff1f<\/h2>\n<p>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u306f\u5358\u306b\u300c\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u3044\u300d\u3068\u3044\u3046\u554f\u984c\u306b\u3068\u3069\u307e\u308a\u307e\u305b\u3093\u3002\u7279\u306b\u30d3\u30b8\u30cd\u30b9\u30b7\u30fc\u30f3\u306b\u304a\u3044\u3066\u306f\u3001\u4fe1\u983c\u6027\u3084\u696d\u52d9\u306e\u30b9\u30d4\u30fc\u30c9\u306b\u3082\u76f4\u7d50\u3059\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002<\/p>\n<h3>\u30d3\u30b8\u30cd\u30b9\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u505c\u6ede<\/h3>\n<p>\u53d6\u5f15\u5148\u3084\u9867\u5ba2\u3068\u306e\u9023\u7d61\u304c\u3046\u307e\u304f\u3044\u304b\u305a\u3001\u8fd4\u4fe1\u304c\u5c4a\u304b\u306a\u3044\u30fb\u8cc7\u6599\u304c\u9001\u308c\u306a\u3044\u3068\u3044\u3063\u305f\u30c8\u30e9\u30d6\u30eb\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u696d\u52d9\u306b\u652f\u969c\u304c\u51fa\u307e\u3059\u3002\u8aa4\u89e3\u3084\u30af\u30ec\u30fc\u30e0\u306b\u3064\u306a\u304c\u308b\u3053\u3068\u3082\u3042\u308b\u305f\u3081\u8fc5\u901f\u306a\u5bfe\u5fdc\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u63a1\u7528\u6d3b\u52d5\u3084\u30b5\u30dd\u30fc\u30c8\u696d\u52d9\u306a\u3069\u3001\u30e1\u30fc\u30eb\u304c\u547d\u7db1\u3068\u306a\u308b\u696d\u52d9\u3067\u306f\u81f4\u547d\u7684\u306a\u5f71\u97ff\u306b\u306a\u308b\u3053\u3068\u3082\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>\u4fe1\u983c\u6027\u30fb\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u306e\u4f4e\u4e0b<\/h3>\n<p>\u300c\u3053\u306e\u4f1a\u793e\u304b\u3089\u306e\u30e1\u30fc\u30eb\u306f\u5c4a\u304b\u306a\u3044\u300d\u3068\u601d\u308f\u308c\u3066\u3057\u307e\u3046\u3068\u3001\u9867\u5ba2\u3084\u30d1\u30fc\u30c8\u30ca\u30fc\u306e\u4fe1\u983c\u3092\u640d\u306a\u3046\u3053\u3068\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u7279\u306b\u72ec\u81ea\u30c9\u30e1\u30a4\u30f3\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u4f01\u696d\u306e\u5834\u5408\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a8d\u8a3c\u306e\u4e0d\u5099\u304c\u30d6\u30e9\u30f3\u30c9\u30a4\u30e1\u30fc\u30b8\u306b\u76f4\u7d50\u3059\u308b\u305f\u3081\u8981\u6ce8\u610f\u3067\u3059\u3002<\/p>\n<h3>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u3068\u306e\u8aa4\u8a8d<\/h3>\n<p>\u4e00\u90e8\u306e\u30e1\u30fc\u30eb\u30a8\u30e9\u30fc\u306f\u30b9\u30d1\u30e0\u6271\u3044\u3084\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3068\u8aa4\u8a8d\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070SMTP\u8a8d\u8a3c\u304c\u9069\u5207\u306b\u884c\u308f\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u6b63\u898f\u306e\u30e1\u30fc\u30eb\u3067\u3042\u3063\u3066\u3082\u4e0d\u5be9\u306a\u3082\u306e\u3068\u898b\u306a\u3055\u308c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u306b\u5bfe\u5fdc\u3092\u6c42\u3081\u3089\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u3092\u672a\u7136\u306b\u9632\u3050\u65b9\u6cd5<\/h2>\n<p>\u30e1\u30fc\u30eb\u306e\u9001\u53d7\u4fe1\u30a8\u30e9\u30fc\u306f\u4e8b\u524d\u306e\u5bfe\u7b56\u306b\u3088\u3063\u3066\u304b\u306a\u308a\u306e\u5272\u5408\u3067\u9632\u6b62\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\u5b9a\u671f\u7684\u306a\u8a2d\u5b9a\u30c1\u30a7\u30c3\u30af\u3084\u9001\u4fe1\u74b0\u5883\u306e\u898b\u76f4\u3057\u304c\u30ab\u30ae\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u9001\u4fe1\u5143\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u5f37\u5316\u3059\u308b<\/h3>\n<p>SPF\u3001DKIM\u3001DMARC\u306a\u3069\u3001\u9001\u4fe1\u30c9\u30e1\u30a4\u30f3\u8a8d\u8a3c\u306e\u8a2d\u5b9a\u3092\u6b63\u3057\u304f\u884c\u3063\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u30b9\u30d1\u30e0\u6271\u3044\u3084\u62d2\u5426\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u30e1\u30fc\u30eb\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u3084\u30b7\u30b9\u30c6\u30e0\u901a\u77e5\u3092\u591a\u304f\u6271\u3046\u4f01\u696d\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u8a2d\u5b9a\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002<\/p>\n<p>\u307e\u305f\u3001SMTP\u8a8d\u8a3c\u3092\u6709\u52b9\u306b\u3057\u6b63\u898f\u306e\u30b5\u30fc\u30d0\u30fc\u7d4c\u7531\u3067\u30e1\u30fc\u30eb\u3092\u9001\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>\u5b9a\u671f\u7684\u306b\u30a8\u30e9\u30fc\u30ed\u30b0\u3084\u914d\u4fe1\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u9001\u4fe1\u5f8c\u306e\u30a8\u30e9\u30fc\u901a\u77e5\u3084\u30ed\u30b0\u3092\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u30c8\u30e9\u30d6\u30eb\u306e\u65e9\u671f\u767a\u898b\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001550\u3084554\u306e\u30a8\u30e9\u30fc\u304c\u983b\u767a\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u5b9b\u5148\u3084\u9001\u4fe1\u30eb\u30fc\u30c8\u306e\u898b\u76f4\u3057\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u30e1\u30fc\u30eb\u30ea\u30ec\u30fc\u30b5\u30fc\u30d3\u30b9\u306a\u3069\u3092\u4f7f\u3048\u3070\u3001\u3088\u308a\u8a73\u7d30\u306a\u30ed\u30b0\u304c\u53d6\u5f97\u3067\u304d\u308b\u305f\u3081\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n<h3>\u30e1\u30fc\u30eb\u914d\u4fe1\u30c4\u30fc\u30eb\u3084\u30ea\u30ec\u30fc\u30b5\u30fc\u30d3\u30b9\u306e\u6d3b\u7528<\/h3>\n<p>\u81ea\u524d\u306e\u30b5\u30fc\u30d0\u30fc\u3067\u904b\u7528\u3059\u308b\u3088\u308a\u3082\u5b9f\u7e3e\u306e\u3042\u308b\u30e1\u30fc\u30eb\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u5224\u5b9a\u306e\u30ea\u30b9\u30af\u3084\u30a8\u30e9\u30fc\u7387\u3092\u5927\u5e45\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u306f\u3001\u5230\u9054\u7387\u3084\u8a8d\u8a3c\u8a2d\u5b9a\u306e\u6700\u9069\u5316\u3092\u81ea\u52d5\u3067\u884c\u3063\u3066\u304f\u308c\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>SMTP\u30ea\u30ec\u30fc\u30fbAPI\u9023\u643a\u30e1\u30fc\u30eb\u914d\u4fe1\u30b7\u30b9\u30c6\u30e0\u300c\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3(blastengine)\u300d\u3068\u306f<\/h2>\n<p><a href=\"https:\/\/blastengine.jp\/\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2020\/04\/blastengine.png\" alt=\"blastengine\u306e\u30ad\u30e3\u30c3\u30c1\u753b\u50cf\" width=\"1313\" height=\"626\" class=\"alignnone wp-image-15605 size-full\" \/><\/a><\/p>\n<p>blastengine\uff08\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\uff09\u306f\u7c21\u5358\u306b\u30e1\u30fc\u30eb\u306e\u5927\u898f\u6a21\u9ad8\u901f\u914d\u4fe1\u304c\u53ef\u80fd\u306aSMTP\u30ea\u30ec\u30fc\u30b5\u30fc\u30d0\u30fc\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u540c\u6642\u306b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u5fc5\u8981\u3068\u3057\u306a\u3044\u3001API\u3067\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u306e\u4ed5\u7d44\u307f\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u306e\u904b\u7528\u3084\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306fblastengine\u3067\u884c\u3046\u305f\u3081\u3001\u5e38\u306b\u9ad8\u3044IP\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4fdd\u3063\u3066\u5b89\u5168\u306b\u30e1\u30fc\u30eb\u3092\u9001\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u5c0e\u5165\u793e\u657027,000\u793e\u300115\u5e74\u9023\u7d9a\u9867\u5ba2\u5c0e\u5165\u6570No.1\u306e\u59c9\u59b9\u88fd\u54c1blastmail\u306e\u6280\u8853\u529b\u3067\u69cb\u7bc9\u3057\u305f\u914d\u4fe1\u57fa\u76e4\u3067\u3001\u5404\u30e1\u30fc\u30eb\u30d7\u30ed\u30d0\u30a4\u30c0\u3001\u643a\u5e2f\u30ad\u30e3\u30ea\u30a2\u30c9\u30e1\u30a4\u30f3\u3078\u306e\u6700\u9069\u5316\u3068\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u7d4c\u7531\u3057\u3066\u30e1\u30fc\u30eb\u914d\u4fe1\u3092\u884c\u3044\u3001<strong>\u65e5\u672c\u56fd\u5185\u3078\u306e\u5727\u5012\u7684\u306a\u5230\u9054\u7387<\/strong>\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u3067\u3044\u3066\u3001\u6708\u984d3,000\u5186\u304b\u3089\u5229\u7528\u304c\u3067\u304d\u308b\u305f\u3081\u30b3\u30b9\u30c8\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3082\u9ad8\u304f\u3001\u30e1\u30fc\u30eb\u3060\u3051\u3067\u306a\u304f\u65e5\u672c\u8a9e\u3067\u306e\u96fb\u8a71\u30b5\u30dd\u30fc\u30c8\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\u306e\u5229\u7528\u3092\u691c\u8a0e\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n<div class=\"list04\">\n<ul>\n<li>\u81ea\u793e\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30c9\u30e1\u30a4\u30f3\u304c\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u3066\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u306a\u3044<\/li>\n<li>\u56fd\u5185\u30ad\u30e3\u30ea\u30a2\u306b\u30e1\u30fc\u30eb\u304c\u5c4a\u304b\u305a\u3001\u5bfe\u5fdc\u65b9\u6cd5\u304c\u308f\u304b\u3089\u306a\u3044<\/li>\n<li>\u81ea\u793e\u3067\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u7ba1\u7406\u30fb\u904b\u7528\u3057\u305f\u304f\u306a\u3044<\/div><\/li>\n<\/ul>\n<p>\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\uff08blastengine\uff09\u306f\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u306e\u5165\u529b\u306e\u307f\u3067\u7121\u6599\u30c8\u30e9\u30a4\u30a2\u30eb\u304c\u53ef\u80fd\u3067\u3059\u306e\u3067\u3001\u307e\u305a\u306f\u6c17\u8efd\u306b\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"su-button-center\"><a href=\"https:\/\/blastengine.jp\/\" class=\"su-button su-button-style-flat event_bnr\" style=\"color:#FFFFFF;background-color:#c12620;border-color:#9b1f1a;border-radius:14px\" target=\"_self\" id=\"selection-blastengine\"><span style=\"color:#FFFFFF;padding:0px 34px;font-size:25px;line-height:50px;border-color:#d46863;border-radius:14px;text-shadow:none\"> \u300c\u30d6\u30e9\u30b9\u30c8\u30a8\u30f3\u30b8\u30f3\u300d\u3092\u7121\u6599\u3067\u8a66\u3059\uff1e<\/span><\/a><\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u306f\u3001\u5358\u306a\u308b\u30b7\u30b9\u30c6\u30e0\u30c8\u30e9\u30d6\u30eb\u3067\u306f\u306a\u304f\u3001\u8a2d\u5b9a\u30df\u30b9\u3084\u5bb9\u91cf\u30aa\u30fc\u30d0\u30fc\u3001\u4fe1\u983c\u6027\u306e\u554f\u984c\u306a\u3069\u3001\u591a\u304f\u306e\u8981\u56e0\u304c\u7d61\u307f\u5408\u3063\u3066\u767a\u751f\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u7279\u306b\u3001\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u306b\u8fbc\u3081\u3089\u308c\u305f\u610f\u5473\u3092\u6b63\u3057\u304f\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3001\u554f\u984c\u89e3\u6c7a\u3078\u306e\u7b2c\u4e00\u6b69\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u3054\u7d39\u4ecb\u3057\u305f\u300c550\u300d\u300c551\u300d\u300c552\u300d\u300c553\u300d\u300c554\u300d\u306a\u3069\u306e\u4ee3\u8868\u7684\u306a\u30a8\u30e9\u30fc\u306f\u3001\u30e1\u30fc\u30eb\u306e\u4e0d\u9054\u30c8\u30e9\u30d6\u30eb\u3067\u983b\u7e41\u306b\u898b\u3089\u308c\u308b\u3082\u306e\u3070\u304b\u308a\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u4e07\u304c\u4e00\u306e\u3068\u304d\u306b\u3082\u30b9\u30e0\u30fc\u30ba\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3082\u3057\u3082\u81ea\u8eab\u3067\u306e\u5bfe\u5fdc\u304c\u96e3\u3057\u3044\u3068\u611f\u3058\u305f\u5834\u5408\u306f\u3001\u7121\u7406\u305b\u305a\u5c02\u9580\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u4e8b\u696d\u8005\u3084\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u306b\u76f8\u8ac7\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002\u5b89\u5b9a\u3057\u305f\u30e1\u30fc\u30eb\u904b\u7528\u306e\u305f\u3081\u306b\u306f\u3001\u65e9\u671f\u306e\u767a\u898b\u3068\u6b63\u78ba\u306a\u5bfe\u51e6\u304c\u306a\u306b\u3088\u308a\u5927\u5207\u3067\u3059\u3002<br \/>\n\u95a2\u9023\u8a18\u4e8b\uff1a<a href=\"https:\/\/blastmail.jp\/blog\/download\/gmail-guideline-5\"><span data-sheets-root=\"1\">Gmail\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u89e3\u8aac\uff06\u5bfe\u5fdc\u65b9\u6cd5<\/span><\/a><a href=\"https:\/\/blastmail.jp\/blog\/download\/emailmagazineutilization\"><\/a><\/p>\n<p><span data-sheets-root=\"1\">\n  <div class=\"blogcard\">\n  <a href=\"\/blog\/download\/gmail-guideline-5\">\n \u00a0 <div class=\"blogcard_thumbnail\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2024\/01\/gmail_bunner.png\" alt=\"Gmail\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u89e3\u8aac\uff06\u5bfe\u5fdc\u30ac\u30a4\u30c9\u30d6\u30c3\u30af\" width=\"90\" height=\"59\" \/><\/div>\n   <div class=\"blogcard_content\">\n    <div class=\"blogcard_title\">Gmail\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u89e3\u8aac\uff06\u5bfe\u5fdc\u30ac\u30a4\u30c9\u30d6\u30c3\u30af<\/div>\n    <div class=\"blogcard_excerpt\">Gmail\u9001\u4fe1\u8005 \u30ac\u30a4\u30c9\u30e9\u30a4\u30f3 \u89e3\u8aac\uff06\u5bfe\u5fdc\u65b9\u6cd5 \u5bfe\u5fdc\u65b9\u6cd5\u3082\u8a18\u8f09\u3057\u305f\u30ac\u30a4\u30c9\u30d6\u30c3\u30af\u3067\u3059\uff01 \u3053\u306e\u8cc7\u6599\u3067\u5206\u304b\u308b\u3053\u3068 Gmail\u9001\u4fe1\u8005\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u89e3\u8aac\uff06\u5bfe\u2026<\/div>\n   <\/div>\n   <div class=\"clear\"><\/div>\n  <\/a>\n  <\/div><\/span><\/p>\n<p><a href=\"https:\/\/blastengine.jp\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/blastmail.jp\/blog\/wp-content\/uploads\/2023\/11\/gmail\u8981\u4ef6\u5f37\u5316_\u30d0\u30ca\u30fcBE_\u9855\u5728_1360x350-1.png\" alt=\"blastengine_gmai\u30d0\u30ca\u30fc\" width=\"1360\" height=\"350\" class=\"alignnone wp-image-17170 size-full\" \/><\/a><\/p>\n<div class=\"blog-faq\"><h2 class=\"blog-faq__title\">FAQ<\/h2><dl class=\"blog-faq__list\">\n<dt class=\"blog-faq__question\">Q\uff1a\u30e1\u30fc\u30eb\u9001\u4fe1\u6642\u306b\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\u304c\u8fd4\u3063\u3066\u304f\u308b\u4e3b\u306a\u539f\u56e0\u306f\u4f55\u3067\u3059\u304b\uff1f<\/dt><dd class=\"blog-faq__answer\">A\uff1a\u4e3b\u306a\u539f\u56e0\u306b\u306f\u3001\u5b9b\u5148\u30a2\u30c9\u30ec\u30b9\u306e\u5165\u529b\u30df\u30b9\u3001\u53d7\u4fe1\u5074\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u5bb9\u91cf\u30aa\u30fc\u30d0\u30fc\u3001\u307e\u305f\u306f\u53d7\u4fe1\u30b5\u30fc\u30d0\u30fc\u306b\u3088\u308b\u30d6\u30ed\u30c3\u30af\u306a\u3069\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u30a8\u30e9\u30fc\u30e1\u30fc\u30eb\u306b\u542b\u307e\u308c\u308b\u300c400\u756a\u53f0\uff08\u4e00\u6642\u7684\u30a8\u30e9\u30fc\uff09\u300d\u3084\u300c500\u756a\u53f0\uff08\u6052\u4e45\u7684\u30a8\u30e9\u30fc\uff09\u300d\u3068\u3044\u3063\u305f<strong>3\u6841\u306e\u6570\u5b57\uff08\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\uff09\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u5177\u4f53\u7684\u306a\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\u3092\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/strong><\/dd>\n<dt class=\"blog-faq__question\">Q\uff1a\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u300c550\u300d\u3084\u300cUser Unknown\u300d\u304c\u8868\u793a\u3055\u308c\u305f\u5834\u5408\u3001\u3069\u3046\u5bfe\u51e6\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/dt><dd 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