{"id":26987,"date":"2020-03-23T02:36:53","date_gmt":"2020-03-23T09:36:53","guid":{"rendered":"https:\/\/kinsta.com\/?p=63364"},"modified":"2026-09-11T16:35:26","modified_gmt":"2026-09-11T07:35:26","slug":"smtp-port","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/smtp-port\/","title":{"rendered":"SMTP\u30dd\u30fc\u30c8\u306e\u9069\u5207\u306a\u9078\u3073\u65b9\uff0825\u3001587\u3001465\u30012525\u756a\u30dd\u30fc\u30c8\uff09"},"content":{"rendered":"<p>SMTP\u3067\u3069\u306e\u30dd\u30fc\u30c8\u3092\u4f7f\u3048\u3070\u3044\u3044\u306e\u304b\u308f\u304b\u3089\u306a\u3044\u3001\u3068\u3044\u3046\u65b9\u306f\u5c11\u306a\u304f\u306a\u3044\u306f\u305a\u3002Apple 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id=\"what\">SMTP\u30dd\u30fc\u30c8\u3068\u306f\uff1f<\/h2>\n<p>SMTP\u3068\u306f\u3001Simple Mail Transfer 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data-end=\"187\">\u30dd\u30fc\u30c8\uff1aSMTP\u306a\u3069\u3001\u305d\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u4e0a\u3067\u52d5\u4f5c\u3059\u308b\u7279\u5b9a\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u8b58\u5225<\/li>\n<\/ul>\n<p>\u4f8b\u3048\u308b\u306a\u3089\u3001IP\u30a2\u30c9\u30ec\u30b9\u304c\u30aa\u30d5\u30a3\u30b9\u8857\u306e\u4f4f\u6240\u3060\u3068\u3059\u308c\u3070\u3001\u30dd\u30fc\u30c8\u306f\u305d\u306e\u5efa\u7269\u5185\u306e\u3069\u306e\u4f1a\u793e\u3092\u8a2a\u306d\u308b\u304b\u3092\u793a\u3059\u756a\u53f7\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u7279\u5b9a\u306e\u4f1a\u793e\u306b\u4f55\u304b\u3092\u914d\u9054\u3057\u305f\u3044\u5834\u5408\u3001\u305d\u306e\u5efa\u7269\u306e\u4f4f\u6240\u3060\u3051\u3067\u306a\u304f\u3001\u4f1a\u793e\u540d\u307e\u3067\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>IP\u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u306a\u3069\u3092\u62c5\u3046\u7d44\u7e54\u3067\u3042\u308b<a 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data-is-only-node>\u5148\u307b\u3069\u89e6\u308c\u305f\u3088\u3046\u306b\u3001SMTP\u306b\u306f\u300c\u9001\u4fe1\uff08Submission\uff09\u300d\u3068\u300c\u4e2d\u7d99\uff08Relay\uff09\u300d\u3068\u3044\u3046\u7570\u306a\u308b\u5f79\u5272\u304c\u3042\u308a\u307e\u3059\u300225\u756a\u30dd\u30fc\u30c8\u306f\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u9593\u306e\u4e2d\u7d99\u306b\u306f\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306a\u3069\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u7528\u9014\u306b\u306f\u9069\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<h3>587\u756a\u30dd\u30fc\u30c8<\/h3>\n<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"16\" 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rel=\"noopener\" data-start=\"165\" data-end=\"207\">TLS<\/a>\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30e1\u30fc\u30eb\u3092\u5b89\u5168\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>465\u756a\u30dd\u30fc\u30c8<\/h3>\n<p>465\u756a\u30dd\u30fc\u30c8\u306f\u3001\u3082\u3068\u3082\u3068SMTPS\uff08SSL\u3092\u4f7f\u7528\u3057\u305fSMTP\uff09\u7528\u3068\u3057\u3066\u767b\u9332\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u7528\u9014\u3067\u4f7f\u7528\u3055\u308c\u305f\u306e\u306f\u77ed\u671f\u9593\u3067\u3001\u305d\u306e\u5f8c\u306f\u5225\u306e\u7528\u9014\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3001SMTP\u7528\u3068\u3057\u3066\u306f\u5ec3\u6b62\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u305d\u308c\u3067\u3082\u73fe\u5728\u3001\u591a\u304f\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\uff08ISP\uff09\u3084\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001SMTP\u3067\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u969b\u306b465\u756a\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>2525\u756a\u30dd\u30fc\u30c8<\/h3>\n<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"17\" data-end=\"158\">2525\u756a\u30dd\u30fc\u30c8\u306f\u3001IETF\u3084IANA\u306b\u3088\u3063\u3066\u6b63\u5f0f\u306aSMTP\u30dd\u30fc\u30c8\u3068\u3057\u3066\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u3001SMTP\u3067\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u969b\u306e587\u756a\u30dd\u30fc\u30c8\u306e\u4ee3\u66ff\u3068\u3057\u3066\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u304a\u308a\u3001\u591a\u304f\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\uff08ISP\uff09\u3084\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d0\u30fc\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p data-start=\"160\" data-end=\"203\" data-is-last-node data-is-only-node>587\u756a\u30dd\u30fc\u30c8\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u30012525\u756a\u30dd\u30fc\u30c8\u304c\u6709\u529b\u306a\u4ee3\u66ff\u624b\u6bb5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2 id=\"which\">SMTP\u306b\u306f\u3069\u306e\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3059\u3079\u304d\uff1f<\/h2>\n<p>\u3053\u3053\u307e\u3067\u306e\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u3066\u3001\u7528\u9014\u306b\u5408\u3063\u305fSMTP\u30dd\u30fc\u30c8\u306e\u9078\u3073\u65b9\u3092\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>WordPress\u30b5\u30a4\u30c8\u3084\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089SMTP\u3067\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u306f\u3001\u57fa\u672c\u7684\u306b<strong>587\u756a\u30dd\u30fc\u30c8<\/strong>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002SMTP\u3067\u306e\u30e1\u30fc\u30eb\u9001\u4fe1\u306b\u6a19\u6e96\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u30dd\u30fc\u30c8\u3067\u3001TLS\u306b\u3088\u308b\u5b89\u5168\u306a\u901a\u4fe1\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4f55\u3089\u304b\u306e\u7406\u7531\u3067587\u756a\u30dd\u30fc\u30c8\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001<strong>2525\u756a\u30dd\u30fc\u30c8<\/strong>\u304c\u4e00\u822c\u7684\u306a\u4ee3\u66ff\u624b\u6bb5\u306b\u306a\u308a\u307e\u3059\u3002\u6b63\u5f0f\u306aSMTP\u30dd\u30fc\u30c8\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u591a\u304f\u306e\u30b5\u30fc\u30d3\u30b9\u3067\u5e83\u304f\u4f7f\u7528\u30fb\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><strong>465\u756a\u30dd\u30fc\u30c8<\/strong>\u3082\u591a\u304f\u306e\u30b5\u30fc\u30d3\u30b9\u3067SMTP\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u73fe\u5728\u306e\u6a19\u6e96\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u307e\u305a\u306f587\u756a\u30dd\u30fc\u30c8\u307e\u305f\u306f2525\u756a\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u3001\u5fc5\u8981\u306a\u5834\u5408\u306b465\u756a\u30dd\u30fc\u30c8\u3092\u691c\u8a0e\u3059\u308b\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3001<strong>25\u756a\u30dd\u30fc\u30c8<\/strong>\u306fSMTP\u306e\u4e2d\u7d99\u306b\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u591a\u304f\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\uff08ISP\uff09\u3084\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d0\u30fc\u3067\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3084WordPress\u30b5\u30a4\u30c8\u304b\u3089\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3059\u308b\u7528\u9014\u306b\u306f\u4f7f\u7528\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>Kinsta\u3067\u5229\u7528\u53ef\u80fd\u306aSMTP\u30dd\u30fc\u30c8<\/h3>\n<p>Kinsta\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30dd\u30fc\u30c8\u3092\u304a\u4f7f\u3044\u3044\u305f\u3060\u3051\u307e\u3059\u3002<\/p>\n<ul>\n<li>587<\/li>\n<li>465<\/li>\n<li>2525<\/li>\n<\/ul>\n<p>\u30b9\u30d1\u30e0\u9632\u6b62\u306e\u305f\u3081\u3001\u5916\u5411\u304d\u306e25\u756a\u30dd\u30fc\u30c8\u306f\u30d6\u30ed\u30c3\u30af\u3057\u3066\u304a\u308a\u3001\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class data-turn-id-container=\"request-WEB:e8cb7a8b-3735-4295-a383-60d551765a66-101\" data-is-intersecting=\"true\">\n<section class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [&#038;:has([data-writing-block])&gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:e8cb7a8b-3735-4295-a383-60d551765a66-101\" data-turn-id-container=\"request-WEB:e8cb7a8b-3735-4295-a383-60d551765a66-101\" data-testid=\"conversation-turn-200\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-8 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content>\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&#038;]:mt-1\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"afc7301e-cd13-43be-9d1e-bc52a4460095\" data-message-model-slug=\"gpt-5-6\" data-turn-start-message=\"true\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"fbskMG_root yWcLfW_streamingContainer markdown prose dark:prose-invert wrap-break-word w-full 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