{"id":10708,"date":"2025-03-17T10:06:39","date_gmt":"2025-03-17T01:06:39","guid":{"rendered":"https:\/\/www.k-in.co.jp\/niwakan\/?p=10708"},"modified":"2025-03-17T10:06:39","modified_gmt":"2025-03-17T01:06:39","slug":"tls-is-required-but-was-not-offered-by-host","status":"publish","type":"post","link":"https:\/\/www.k-in.co.jp\/niwakan\/archives\/2025\/03\/10708\/","title":{"rendered":"TLS is required, but was not offered by host"},"content":{"rendered":"

k-in\u306e\u30b5\u30fc\u30d0\u30fc\u304b\u3089Gmail\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u306e\u3067\u3001\u4ed6\u306e\u4eba\u306e\u3068\u3053\u308d\u306b\u3082\u9001\u3063\u3066\u307f\u305f\u3002
\n\u3059\u308b\u3068Mail Delivery System\u304b\u3089\u8ee2\u9001\u3067\u304d\u306a\u304b\u3063\u305f\u3068\u2026\u2026\u3042\u308c\u3063\uff1f
\n<\/p>\n

\u5185\u5bb9\u7684\u306b\u306f\u3053\u3046\u3067\u3042\u308b\u3002<\/p>\n

This is the mail system at host mail.k-in.co.jp.<\/p>\n

I’m sorry to have to inform you that your message could not
\nbe delivered to one or more recipients. It’s attached below.<\/p>\n

For further assistance, please send mail to postmaster.<\/p>\n

If you do so, please include this problem report. You can
\ndelete your own text from the attached returned message.<\/p>\n

The mail system<\/p>\n

: TLS is required, but was not offered by host
\n mail.example.jp[xxx.xxx.xxx.xxx]<\/div>\n

Google\u3055\u3093\u306b\u7ffb\u8a33\u3092\u983c\u307f\u307e\u3059\u3002<\/p>\n

\u3053\u308c\u306f\u30db\u30b9\u30c8 mail.k-in.co.jp \u306e\u30e1\u30fc\u30eb \u30b7\u30b9\u30c6\u30e0\u3067\u3059\u3002<\/p>\n

\u7533\u3057\u8a33\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092 1 \u4eba\u4ee5\u4e0a\u306e\u53d7\u4fe1\u8005\u306b\u914d\u4fe1\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u4ee5\u4e0b\u306b\u6dfb\u4ed8\u3057\u307e\u3059\u3002<\/p>\n

\u3055\u3089\u306b\u30b5\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001postmaster \u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u305d\u306e\u5834\u5408\u306f\u3001\u3053\u306e\u554f\u984c\u30ec\u30dd\u30fc\u30c8\u3092\u542b\u3081\u3066\u304f\u3060\u3055\u3044\u3002 \u6dfb\u4ed8\u3055\u308c\u305f\u8fd4\u4fe1\u30e1\u30c3\u30bb\u30fc\u30b8\u304b\u3089\u81ea\u5206\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u30e1\u30fc\u30eb \u30b7\u30b9\u30c6\u30e0<\/p>\n

: TLS \u304c\u5fc5\u8981\u3067\u3059\u304c\u3001\u30db\u30b9\u30c8 mail.example.jp[xxx.xxx.xxx.xxx] \u3067\u306f\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u305b\u3093<\/div>\n

\u4f55\u3060\u304b\u306a\uff1f<\/p>\n

\u3084\u306f\u308aGoogle\u3055\u3093\u306b\u554f\u3046\u3068\u3001\u300eTLS is required\u3067SMTP\u30b5\u30fc\u30d0\u304c\u9001\u4fe1\u3067\u304d\u306a\u304f\u306a\u308b<\/a>\u300f\u3068\u540c\u3058\u72b6\u6cc1\u306e\u65b9\u304c\u304a\u308a\u3001\u89e3\u6c7a\u3055\u308c\u3066\u3044\u305f\u3088\u3046\u306a\u306e\u3067\u540c\u69d8\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u5909\u66f4\u5185\u5bb9\u3068\u3057\u3066\u306f\u3001postfix\u306emain.cf\u5185\u306e\u300esmtp_tls_security_level = encrypt\u300f\u3001\u3053\u306eencrypt<\/strong>\u3092any<\/strong>\u306b\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u3057\u305f\u3002
\n\u3055\u3066\u3001\u6b64\u308c\u3067\u66ab\u304f\u69d8\u5b50\u3092\u898b\u3088\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

k-in\u306e\u30b5\u30fc\u30d0\u30fc\u304b\u3089Gmail\u306b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u306e\u3067\u3001\u4ed6\u306e\u4eba\u306e\u3068\u3053\u308d\u306b\u3082\u9001\u3063\u3066\u307f\u305f\u3002 \u3059\u308b\u3068Mail Delivery System\u304b\u3089\u8ee2\u9001\u3067\u304d\u306a\u304b\u3063\u305f\u3068\u2026\u2026\u3042\u308c\u3063\uff1f<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[115],"tags":[176,175,148],"class_list":["post-10708","post","type-post","status-publish","format-standard","hentry","category-software","tag-mail","tag-postfix","tag-server"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/posts\/10708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/comments?post=10708"}],"version-history":[{"count":0,"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/posts\/10708\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/media?parent=10708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/categories?post=10708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.k-in.co.jp\/niwakan\/wp-json\/wp\/v2\/tags?post=10708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}