{"id":9384,"date":"2025-03-19T14:03:42","date_gmt":"2025-03-19T13:03:42","guid":{"rendered":"https:\/\/webhosting.de\/einrichtung-sicherer-email-server-anleitung\/"},"modified":"2025-03-19T14:11:56","modified_gmt":"2025-03-19T13:11:56","slug":"%e3%82%bb%e3%82%ad%e3%83%a5%e3%82%a2%e3%83%a1%e3%83%bc%e3%83%ab%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e8%a8%ad%e5%ae%9a%e6%89%8b%e9%a0%86","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/einrichtung-sicherer-email-server-anleitung\/","title":{"rendered":"\u5b89\u5168\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\uff1a\u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u30fb\u30ac\u30a4\u30c9"},"content":{"rendered":"

\u6b63\u3057\u3044\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u9078\u629e<\/h2>\n

\u30bb\u30ad\u30e5\u30a2\u306aE\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3059\u308b\u5834\u5408\u3001\u9069\u5207\u306a\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u6700\u521d\u306e\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u3068\u306a\u308a\u307e\u3059\u3002\u5b89\u5b9a\u6027\u3068\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u52b9\u7387\u306b\u512a\u308c\u305f\u5f37\u529b\u306a\u30b5\u30fc\u30d0\u30fc\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u5c0f\u898f\u6a21\u306a\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u3042\u308c\u3070Raspberry Pi\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u304c\u3001\u5927\u4f01\u696d\u3067\u3042\u308c\u3070\u5c02\u7528\u30b5\u30fc\u30d0\u30fc\u3084\u4eee\u60f3\u5c02\u7528\u30b5\u30fc\u30d0\u30fc\uff08VPS\uff09\u3092\u5229\u7528\u3059\u3079\u304d\u3067\u3059\u3002 <\/p>\n

\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u8003\u616e\u4e8b\u9805\uff1a
\n- \u30d7\u30ed\u30bb\u30c3\u30b5\u30fc\uff1a\u6700\u65b0\u306e\u5f37\u529b\u306a\u30d7\u30ed\u30bb\u30c3\u30b5\u30fc\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u30b5\u30fc\u30d3\u30b9\u306e\u9ad8\u901f\u51e6\u7406\u306b\u8ca2\u732e\u3057\u307e\u3059\u3002
\n- RAM: \u5c0f\u898f\u6a21\u74b0\u5883\u3067\u306f\u6700\u4f4e2GB\u3001\u5927\u898f\u6a21\u74b0\u5883\u3067\u306f8GB\u4ee5\u4e0a\u3002
\n- \u30b9\u30c8\u30ec\u30fc\u30b8\u30b9\u30da\u30fc\u30b9\uff1aSSD\u306f\u30b9\u30d4\u30fc\u30c9\u3068\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3002
\n- \u56fa\u5b9aIP\u30a2\u30c9\u30ec\u30b9\uff1aSPAM\u30d6\u30e9\u30c3\u30af\u30ea\u30b9\u30c8\u306e\u56de\u907f\u3068\u5b89\u5b9a\u3057\u305f\u30a2\u30af\u30bb\u30b9\u306e\u305f\u3081\u306b\u91cd\u8981\u3067\u3059\u3002 <\/p>\n

DNS\u8a2d\u5b9a\u306e\u6700\u9069\u5316<\/h2>\n

\u30bb\u30ad\u30e5\u30a2\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30b5\u30fc\u30d0\u30fc\u304c\u6b63\u3057\u304f\u6a5f\u80fd\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u6b63\u78ba\u306aDNS\u8a2d\u5b9a\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u3053\u3053\u3067\u306f\u4ee5\u4e0b\u306e\u9805\u76ee\u304c\u91cd\u8981\u3067\u3042\u308b\uff1a <\/p>\n

- MX\u30ec\u30b3\u30fc\u30c9\uff1a\u30c9\u30e1\u30a4\u30f3\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u62c5\u5f53\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u3092\u5b9a\u7fa9\u3059\u308b\u3002
\n- SPF\uff08Sender Policy Framework\uff09\uff1a\u304a\u5ba2\u69d8\u306e\u30c9\u30e1\u30a4\u30f3\u306b\u4ee3\u308f\u3063\u3066\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u6a29\u9650\u3092\u6301\u3064\u30b5\u30fc\u30d0\u30fc\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002
\n- DKIM\uff08DomainKeys Identified Mail\uff09\uff1a\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u507d\u9020\u3092\u9632\u3050\u305f\u3081\u306b\u30c7\u30b8\u30bf\u30eb\u7f72\u540d\u3092\u8ffd\u52a0\u3059\u308b\u3002
\n- DMARC\uff08Domain-based Message Authentication, Reporting, and Conformance\uff09\uff1aSPF\u3068DKIM\u304c\u6b63\u3057\u304f\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002 \u30d5\u30a3\u30c3\u30b7\u30f3\u30b0<\/a> \u3092\u9632\u3050\u3002 <\/p>\n

SPF\u3001DKIM\u3001DMARC\u306e\u8a2d\u5b9a\u65b9\u6cd5\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u5f53\u793e\u306e \u5305\u62ec\u7684\u96fb\u5b50\u30e1\u30fc\u30eb\u8a8d\u8a3c\u30ac\u30a4\u30c9<\/a>. <\/p>\n

\u6b63\u3057\u3044\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u9078\u629e<\/h2>\n

\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30b5\u30fc\u30d0\u30fc\u3092\u904b\u7528\u3059\u308b\u305f\u3081\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30fb\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u3001\u8a66\u884c\u932f\u8aa4\u3092\u91cd\u306d\u305f\u3082\u306e\u304c\u3044\u304f\u3064\u304b\u3042\u308b\uff1a <\/p>\n

\u2013 \u30dd\u30b9\u30c8\u30d5\u30a3\u30c3\u30af\u30b9<\/a>\u975e\u5e38\u306b\u67d4\u8edf\u3067\u3001\u5e83\u304f\u4f7f\u308f\u308c\u3001\u5b89\u5b9a\u3057\u3066\u3044\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3002
\n- Exim\uff1a\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u304c\u7c21\u5358\u306a\u306e\u3067\u3001\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u74b0\u5883\u3067\u306f\u7279\u306b\u4eba\u6c17\u304c\u3042\u308b\u3002
\n- \u30bb\u30f3\u30c9\u30e1\u30fc\u30eb\uff1a\u5b9a\u756a\u3060\u304c\u3001\u8907\u96d1\u306a\u305f\u3081\u521d\u5fc3\u8005\u306b\u306f\u4e0d\u5411\u304d\u3002
\n- Dovecot\uff1aIMAP\u304a\u3088\u3073POP3\u30b5\u30fc\u30d0\u30fc\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u52b9\u7387\u7684\u306b\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u914d\u4fe1\u3059\u308b\u3002 <\/p>\n

\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3001\u5b9a\u671f\u7684\u306b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002 \u66f4\u65b0\u60c5\u5831<\/a> \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30ae\u30e3\u30c3\u30d7\u3092\u53ef\u80fd\u306a\u9650\u308a\u65e9\u304f\u57cb\u3081\u308b\u3002 <\/p>\n

\u6697\u53f7\u5316\uff1a\u901a\u4fe1\u306e\u4fdd\u8b77<\/h2>\n

\u6697\u53f7\u5316\u306a\u3057\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u96fb\u5b50\u30e1\u30fc\u30eb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306f\u4e2d\u9593\u8005\u653b\u6483\uff08man-in-the-middle attack\uff09\u306b\u5bfe\u3057\u3066\u8106\u5f31\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3059\u3079\u3066\u306e\u63a5\u7d9a\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a <\/p>\n

- SSL\/TLS\u6697\u53f7\u5316\uff1a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u9593\u306e\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u3002
\n- Let's Encrypt\u8a3c\u660e\u66f8\uff1a HTTPS\u3068SMTP\u3092\u6697\u53f7\u5316\u3059\u308b\u305f\u3081\u306b\u3001\u7121\u6599\u3067\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u308b\u3002
\n- \u30a8\u30f3\u30c9\u30c4\u30fc\u30a8\u30f3\u30c9\u306e\u6697\u53f7\u5316\uff1a\u7279\u306b\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u96fb\u5b50\u30e1\u30fc\u30eb\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u306fPGP\u307e\u305f\u306fS\/MIME\u3092\u4f7f\u7528\u3002 <\/p>\n

\u52b9\u679c\u7684\u306a\u30b9\u30d1\u30e0\u304a\u3088\u3073\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56<\/h2>\n

\u53d7\u4fe1\u7bb1\u304c\u30b9\u30d1\u30e0\u3067\u6ea2\u308c\u308b\u306e\u306f\u8ab0\u3060\u3063\u3066\u5acc\u306a\u3082\u306e\u3067\u3059\u3002\u3060\u304b\u3089\u3053\u305d\u3001\u5f37\u529b\u306a\u4fdd\u8b77\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u5fc5\u9808\u306a\u306e\u3060\uff1a <\/p>\n

- SpamAssassin\u307e\u305f\u306fRspamd\u306f\u3001\u4e0d\u8981\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u5206\u6790\u3057\u3001\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u307e\u3059\u3002
\n- ClamAV\u306f\u53d7\u4fe1\u30e1\u30fc\u30eb\u306e\u30a6\u30a3\u30eb\u30b9\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u306e\u9001\u4fe1\u3092\u9632\u304e\u307e\u3059\u3002
\n- Greylisting\u306f\u3001\u30b9\u30d1\u30e0\u3092\u3055\u3089\u306b\u6e1b\u3089\u3059\u305f\u3081\u306b\u3001\u7591\u308f\u3057\u3044\u30e1\u30fc\u30eb\u306e\u914d\u4fe1\u3092\u9045\u3089\u305b\u307e\u3059\u3002 <\/p>\n

\u6700\u65b0\u306eAI\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30d5\u30a3\u30eb\u30bf\u30fc\u306f\u3001\u30b9\u30d1\u30e0\u3084\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u3092\u3055\u3089\u306b\u52b9\u7387\u7684\u306b\u8a8d\u8b58\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8a73\u3057\u304f\u306f AI\u3092\u6d3b\u7528\u3057\u305f\u30e1\u30fc\u30eb\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306e\u3054\u6848\u5185<\/a>. <\/p>\n

\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8a2d\u5b9a\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/h2>\n

\u96fb\u5b50\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u6f5c\u5728\u7684\u306a\u653b\u6483\u304b\u3089\u7279\u5225\u306b\u4fdd\u8b77\u3055\u308c\u308b\u3079\u304d\u3067\u3042\u308b\u3002\u3053\u308c\u306b\u306f\u4ee5\u4e0b\u304c\u542b\u307e\u308c\u308b\u3002 <\/p>\n

- \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8a2d\u5b9a\uff1a25\uff08SMTP\uff09\u3001465\uff08SMTPS\uff09\u3001993\uff08IMAPS\uff09\u306a\u3069\u3001\u5fc5\u8981\u306a\u30dd\u30fc\u30c8\u306e\u307f\u3092\u958b\u304d\u307e\u3059\u3002
\n- \u4fb5\u5165\u691c\u77e5\u30b7\u30b9\u30c6\u30e0\uff08IDS\uff09\uff1aFail2Ban\u306a\u3069\u306e\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u60aa\u610f\u306e\u3042\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u81ea\u52d5\u7684\u306b\u8a8d\u8b58\u3057\u3001\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002
\n- \u591a\u8981\u7d20\u8a8d\u8a3c\uff08MFA\uff09\uff1a\u7ba1\u7406\u8005\u3068\u30e6\u30fc\u30b6\u30fc\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u3055\u3089\u306b\u5f37\u5316\u3057\u307e\u3059\u3002 <\/p>\n

\u30c7\u30fc\u30bf\u640d\u5931\u3092\u9632\u3050\u305f\u3081\u306e\u5b9a\u671f\u7684\u306a\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/h2>\n

\u8aa4\u4f5c\u52d5\u3084\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306f\u3001\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u3092\u5371\u967a\u306b\u3055\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6226\u7565\u3092\u7528\u3044\u308b\u3079\u304d\u3067\u3042\u308b\uff1a <\/p>\n

- \u5916\u90e8\u30b5\u30fc\u30d0\u30fc\u307e\u305f\u306f\u30af\u30e9\u30a6\u30c9\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u6bce\u65e5\u81ea\u52d5\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3002
\n- \u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30bf\u30eb\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306b\u3088\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3067\u3001\u5fc5\u8981\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002
\n- \u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u767a\u751f\u5f8c\u306b\u30c7\u30fc\u30bf\u3092\u8fc5\u901f\u306b\u5fa9\u5143\u3059\u308b\u305f\u3081\u306e\u30c7\u30a3\u30b6\u30b9\u30bf\u30ea\u30ab\u30d0\u30ea\u8a08\u753b\u3002 <\/p>\n

\u30ed\u30ae\u30f3\u30b0\u3068\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306b\u3088\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5f37\u5316<\/h2>\n

\u5b89\u5168\u306a\u30b7\u30b9\u30c6\u30e0\u306f\u76e3\u8996\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u5b8c\u5168\u306a\u30ed\u30ae\u30f3\u30b0\u306f\u3001\u653b\u6483\u3092\u65e9\u3044\u6bb5\u968e\u3067\u8a8d\u8b58\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u3002\u91cd\u8981\u306a\u30c4\u30fc\u30eb <\/p>\n

- Logwatch\u3084GoAccess\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306e\u30ed\u30b0\u3092\u5206\u6790\u3057\u3001\u7591\u308f\u3057\u3044\u6d3b\u52d5\u3092\u8868\u793a\u3059\u308b\u3002
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