{"id":4783,"date":"2024-01-19T05:01:20","date_gmt":"2024-01-18T20:01:20","guid":{"rendered":"https:\/\/m365jp.tk\/?p=4783"},"modified":"2024-01-19T05:06:45","modified_gmt":"2024-01-18T20:06:45","slug":"servicedegradation-ex703958-exchange-online-some-users-may-be-unable-to-send-or-receive-email-messages-and-receive-a-non-delivery-report-ndr-10","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2024-01-19-servicedegradation-ex703958-exchange-online-some-users-may-be-unable-to-send-or-receive-email-messages-and-receive-a-non-delivery-report-ndr-10","title":{"rendered":"[serviceDegradation] EX703958 | Exchange Online | Some users may be unable to send or receive email messages and receive a Non-Delivery Report (NDR)"},"content":{"rendered":"
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EX703958 | Exchange Online | Some users may be unable to send or receive email messages and receive a Non-Delivery Report (NDR)<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceDegradation<\/td>\n<\/tr>\n
Classification<\/th>\nincident<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be unable to send or receive email messages and receive a NDR with a 550 or 554 error code.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/18\/2024 19:23:14<\/td>\n<\/tr>\n
Start Time<\/th>\n01\/04\/2024 22:09:25<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may be unable to send or receive email messages and receive a Non-Delivery Report (NDR)<\/p>\n

User impact: Users may be unable to send or receive email messages and receive a NDR with a 550 or 554 error code.<\/p>\n

More info: This issue only occurs if either the sender or user who is receiving the message is utilizing a specific third-party anti-spam service. Senders receive the NDR which states that the message has been rejected due to a 550 or 554 error code and that their host IP address is listed on the third-party anti-spam service.<\/p>\n

The error messages state “550 5.7.350 Remote server returned message detected as spam”, “554 5.7.1 Service unavailable; Client host [xxx.xxx.xxx.xxx] blocked”, or “\u200e550 5.7.1 This email was rejected because it violates our security policy.”<\/p>\n

Current status: We\u2019re continuing to work closely with the third-party service to delist additional IP addresses that are being blocked on the third-party\u2019s anti-spam service. Since introducing anti-spam optimization changes, we\u2019ve observed a reduction in the total number of blocked instances and we\u2019re continuing to implement additional anti-spam optimization changes to mitigate impact further.<\/p>\n

Scope of impact: This issue may affect any user’s mail flow if the recipient is leveraging a specific third-party anti-spam service to filter email messages.<\/p>\n

Next update by: Friday, January 19, 2024, at 7:30 PM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb: \u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u53d7\u4fe1\u3067\u304d\u305a\u3001\u914d\u4fe1\u4e0d\u80fd\u30ec\u30dd\u30fc\u30c8 (NDR) \u3092\u53d7\u4fe1\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff: \u30e6\u30fc\u30b6\u30fc\u304c\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u53d7\u4fe1\u3067\u304d\u305a\u3001\u30a8\u30e9\u30fc \u30b3\u30fc\u30c9\u304c 550 \u307e\u305f\u306f 554 \u306e NDR \u3092\u53d7\u4fe1\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831: \u3053\u306e\u554f\u984c\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u4fe1\u3057\u3066\u3044\u308b\u9001\u4fe1\u8005\u307e\u305f\u306f\u30e6\u30fc\u30b6\u30fc\u304c\u7279\u5b9a\u306e\u30b5\u30fc\u30c9 \u30d1\u30fc\u30c6\u30a3\u306e\u30b9\u30d1\u30e0\u5bfe\u7b56\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u306e\u307f\u767a\u751f\u3057\u307e\u3059\u3002\u9001\u4fe1\u8005\u306f\u3001550 \u307e\u305f\u306f 554 \u30a8\u30e9\u30fc \u30b3\u30fc\u30c9\u304c\u539f\u56e0\u3067\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u62d2\u5426\u3055\u308c\u3001\u30db\u30b9\u30c8 IP \u30a2\u30c9\u30ec\u30b9\u304c\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306e\u30b9\u30d1\u30e0\u5bfe\u7b56\u30b5\u30fc\u30d3\u30b9\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059 NDR \u3092\u53d7\u4fe1\u3057\u307e\u3059\u3002<\/p>\n

\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u306f\u3001\u300c550 5.7.350\u30ea\u30e2\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u304c\u30b9\u30d1\u30e0\u3068\u3057\u3066\u691c\u51fa\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8fd4\u3057\u307e\u3057\u305f\u300d\u3001\u300c554 5.7.1\u30b5\u30fc\u30d3\u30b9\u304c\u5229\u7528\u3067\u304d\u307e\u305b\u3093\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30db\u30b9\u30c8 [xxx.xxx.xxx.xxx] \u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3057\u305f\u300d\u3001\u307e\u305f\u306f\u300c?550 5.7.1 \u3053\u306e\u30e1\u30fc\u30eb\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30dd\u30ea\u30b7\u30fc\u306b\u9055\u53cd\u3057\u3066\u3044\u308b\u305f\u3081\u62d2\u5426\u3055\u308c\u307e\u3057\u305f\u3002\u300d<\/p>\n

\u73fe\u5728\u306e\u30b9\u30c6\u30fc\u30bf\u30b9: \u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306e\u30b9\u30d1\u30e0\u5bfe\u7b56\u30b5\u30fc\u30d3\u30b9\u3067\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u8ffd\u52a0\u306e IP \u30a2\u30c9\u30ec\u30b9\u3092\u9664\u5916\u3059\u308b\u305f\u3081\u306b\u3001\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306e\u30b5\u30fc\u30d3\u30b9\u3068\u7dca\u5bc6\u306b\u9023\u643a\u3057\u3066\u3044\u307e\u3059\u3002\u30b9\u30d1\u30e0\u5bfe\u7b56\u6700\u9069\u5316\u306e\u5909\u66f4\u3092\u5c0e\u5165\u3057\u3066\u4ee5\u6765\u3001\u30d6\u30ed\u30c3\u30af\u3055\u308c\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u7dcf\u6570\u304c\u6e1b\u5c11\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u3066\u304a\u308a\u3001\u5f71\u97ff\u3092\u3055\u3089\u306b\u8efd\u6e1b\u3059\u308b\u305f\u3081\u306b\u8ffd\u52a0\u306e\u30b9\u30d1\u30e0\u5bfe\u7b56\u6700\u9069\u5316\u306e\u5909\u66f4\u3092\u5f15\u304d\u7d9a\u304d\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2: \u3053\u306e\u554f\u984c\u306f\u3001\u53d7\u4fe1\u8005\u304c\u7279\u5b9a\u306e\u30b5\u30fc\u30c9 \u30d1\u30fc\u30c6\u30a3\u306e\u30b9\u30d1\u30e0\u5bfe\u7b56\u30b5\u30fc\u30d3\u30b9\u3092\u5229\u7528\u3057\u3066\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30d5\u30a3\u30eb\u30bf\u30fc\u51e6\u7406\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb \u30d5\u30ed\u30fc\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6b21\u306e\u66f4\u65b0: 2024\u5e741\u670819\u65e5 \u91d1\u66dc\u65e5 19:30 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX703958 | Exchange Online | Some users may be unable to send or receive email messages and receive a Non-Deli […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4783","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/4783","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/comments?post=4783"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/4783\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=4783"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=4783"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=4783"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}