{"id":10614,"date":"2025-03-25T06:01:04","date_gmt":"2025-03-24T21:01:04","guid":{"rendered":"https:\/\/m365jp.net\/?p=10614"},"modified":"2025-03-25T06:03:15","modified_gmt":"2025-03-24T21:03:15","slug":"servicerestored-ex1030895-exchange-online-some-users-may-encounter-non-delivery-report-ndr-failures-when-sending-or-receiving-email-messages","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2025-03-25-servicerestored-ex1030895-exchange-online-some-users-may-encounter-non-delivery-report-ndr-failures-when-sending-or-receiving-email-messages","title":{"rendered":"[serviceRestored] EX1030895 | Exchange Online | Some users may encounter Non-Delivery Report (NDR) failures when sending or receiving email messages"},"content":{"rendered":"
\n
\n
\n\n\n\n
EX1030895 | Exchange Online | Some users may encounter Non-Delivery Report (NDR) failures when sending or receiving email messages<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n\n\n\n\n\n\n\n\n\n\n
Status<\/th>\nserviceRestored<\/td>\n<\/tr>\n
Classification<\/th>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nSome users may have encountered NDR failures when sending or receiving email messages in Exchange Online.<\/td>\n<\/tr>\n
Last Updated<\/th>\n03\/24\/2025 20:50:22<\/td>\n<\/tr>\n
Start Time<\/th>\n03\/09\/2025 12:07:00<\/td>\n<\/tr>\n
End Time<\/th>\n03\/24\/2025 20:41:06<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Some users may encounter Non-Delivery Report (NDR) failures when sending or receiving email messages<\/p>\n

User impact: Some users may have encountered NDR failures when sending or receiving email messages in Exchange Online.<\/p>\n

More info: Users may have received an NDR containing an error stating “554 5.6.0 Corrupt message content”.<\/p>\n

Additionally, users may have intermittently received calendar invite email messages as a plain text message containing winmail.dat attachments.<\/p>\n

Users may have been able to send affected messages by attempting to resend.<\/p>\n

Final status: We’ve completed our work to replay affected email messages and confirmed through service telemetry that NDR failure rates have returned to pre-incident thresholds; the service is maintaining a 99.99 percent success rate. If your organization continues to experience NDRs when sending email messages, we recommend contacting your support representative for further assistance.<\/p>\n

Scope of impact: Some users serviced by the impacted portion of infrastructure sending or receiving email in Exchange Online may have been affected, although impact is limited to a small subset of messages.<\/p>\n

Start time: Sunday, March 9, 2025, at 12:07 PM UTC<\/p>\n

End time: Monday, March 24, 2025, at 7:06 PM UTC<\/p>\n

Preliminary root cause: A recent change to caching logic introduced a condition where messages with specific properties were cached, and subsequent messages containing those same cached properties were then rejected, resulting in NDR errors.<\/p>\n

Next steps:
-We’re examining the process by which we test and introduce changes to our caching logic to ensure caching issues aren’t introduced in future updates.<\/p>\n

We’ll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb: \u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u53d7\u4fe1\u6642\u306b\u914d\u4fe1\u4e0d\u80fd\u30ec\u30dd\u30fc\u30c8 (NDR) \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff: \u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001Exchange Online\u3067\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u53d7\u4fe1\u3059\u308b\u3068\u304d\u306b NDR \u30a8\u30e9\u30fc\u306b\u906d\u9047\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30: \u30e6\u30fc\u30b6\u30fc\u306f\u3001”554 5.6.0 \u7834\u640d\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u5185\u5bb9” \u3068\u3044\u3046\u30a8\u30e9\u30fc\u3092\u542b\u3080 NDR \u3092\u53d7\u3051\u53d6\u3063\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3055\u3089\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30ab\u30ec\u30f3\u30c0\u30fc\u306e\u62db\u5f85\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u3001winmail.dat\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3080\u30d7\u30ec\u30fc\u30f3 \u30c6\u30ad\u30b9\u30c8 \u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u3057\u3066\u65ad\u7d9a\u7684\u306b\u53d7\u4fe1\u3057\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u518d\u9001\u4fe1\u3092\u8a66\u307f\u308b\u3053\u3068\u3067\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3067\u304d\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u6700\u7d42\u30b9\u30c6\u30fc\u30bf\u30b9: \u5f71\u97ff\u3092\u53d7\u3051\u305f\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u518d\u751f\u3059\u308b\u4f5c\u696d\u3092\u5b8c\u4e86\u3057\u3001\u30b5\u30fc\u30d3\u30b9 \u30c6\u30ec\u30e1\u30c8\u30ea\u3092\u901a\u3058\u3066 NDR \u306e\u5931\u6557\u7387\u304c\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u524d\u306e\u3057\u304d\u3044\u5024\u306b\u623b\u3063\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u30b5\u30fc\u30d3\u30b9\u306f99.99%\u306e\u6210\u529f\u7387\u3092\u7dad\u6301\u3057\u3066\u3044\u307e\u3059\u3002\u7d44\u7e54\u3067\u96fb\u5b50\u30e1\u30fc\u30eb \u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u4fe1\u6642\u306b NDR \u304c\u5f15\u304d\u7d9a\u304d\u767a\u751f\u3059\u308b\u5834\u5408\u306f\u3001\u30b5\u30dd\u30fc\u30c8\u62c5\u5f53\u8005\u306b\u9023\u7d61\u3057\u3066\u30b5\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2: Exchange Online \u3067\u96fb\u5b50\u30e1\u30fc\u30eb\u3092\u9001\u53d7\u4fe1\u3059\u308b\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308b\u90e8\u5206\u306b\u3088\u3063\u3066\u30b5\u30fc\u30d3\u30b9\u3092\u53d7\u3051\u3066\u3044\u308b\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5f71\u97ff\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u5c0f\u3055\u306a\u30b5\u30d6\u30bb\u30c3\u30c8\u306b\u9650\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u958b\u59cb\u6642\u9593: 2025 \u5e74 3 \u6708 9 \u65e5 (\u65e5) 12:07 PM UTC<\/p>\n

\u7d42\u4e86\u6642\u523b: 2025 \u5e74 3 \u6708 24 \u65e5\u6708\u66dc\u65e5\u5348\u5f8c 7 \u6642 06 \u5206 (UTC)<\/p>\n

\u66ab\u5b9a\u7684\u306a\u6839\u672c\u539f\u56e0: \u30ad\u30e3\u30c3\u30b7\u30e5 \u30ed\u30b8\u30c3\u30af\u306e\u6700\u8fd1\u306e\u5909\u66f4\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u6301\u3064\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3001\u540c\u3058\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u542b\u3080\u5f8c\u7d9a\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u62d2\u5426\u3055\u308c\u3001NDR \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3068\u3044\u3046\u6761\u4ef6\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u306e\u30b9\u30c6\u30c3\u30d7:
– \u30ad\u30e3\u30c3\u30b7\u30e5 \u30ed\u30b8\u30c3\u30af\u3092\u30c6\u30b9\u30c8\u3057\u3066\u5909\u66f4\u3092\u5c0e\u5165\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092\u691c\u8a0e\u3057\u3066\u304a\u308a\u3001\u5c06\u6765\u306e\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u4e8b\u5f8c\u30ec\u30dd\u30fc\u30c8\u306e\u4e88\u5099\u7248\u306f2\u55b6\u696d\u65e5\u4ee5\u5185\u306b\u3001\u6700\u7d42\u7684\u306a\u4e8b\u5f8c\u5831\u544a\u66f8\u306f5\u55b6\u696d\u65e5\u4ee5\u5185\u306b\u63d0\u51fa\u3057\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1030895 | Exchange Online | Some users may encounter Non-Delivery Report (NDR) failures when sending or rece […]<\/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-10614","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/10614","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=10614"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/10614\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=10614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=10614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=10614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}