{"id":14650,"date":"2026-01-23T19:01:25","date_gmt":"2026-01-23T10:01:25","guid":{"rendered":"https:\/\/m365jp.net\/?p=14650"},"modified":"2026-01-23T19:10:05","modified_gmt":"2026-01-23T10:10:05","slug":"servicedegradation-ex1221076-exchange-online-users-may-be-unable-to-delete-email-messages-after-running-the-quit-command-when-pop3-connection-method-is-used-2","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-23-servicedegradation-ex1221076-exchange-online-users-may-be-unable-to-delete-email-messages-after-running-the-quit-command-when-pop3-connection-method-is-used-2","title":{"rendered":"[serviceDegradation] EX1221076 | Exchange Online | Users may be unable to delete email messages after running the QUIT command when POP3 connection method is used"},"content":{"rendered":"
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EX1221076 | Exchange Online | Users may be unable to delete email messages after running the QUIT command when POP3 connection method is used<\/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>\nadvisory<\/td>\n<\/tr>\n
User Impact<\/th>\nUsers may be unable to delete email messages after running the QUIT command when POP3 connection method is used.<\/td>\n<\/tr>\n
Last Updated<\/th>\n01\/23\/2026 09:13:56<\/td>\n<\/tr>\n
Start Time<\/th>\n01\/22\/2026 11:17:04<\/td>\n<\/tr>\n
End Time<\/th>\n<\/td>\n<\/tr>\n
Latest Message<\/th>\nTitle: Users may be unable to delete email messages after running the QUIT command when POP3 connection method is used<\/p>\n

User impact: Users may be unable to delete email messages after running the QUIT command when POP3 connection method is used.<\/p>\n

More info: Specifically, POP3 users can read and download their email messages, but any messages they delete may not actually be removed, because the session fails to close properly. If a message is deleted on Exchange Online using the DELE command, the POP3 QUIT command may fail, preventing the session from closing cleanly and causing messages marked for deletion to remain in the mailbox.<\/p>\n

If the user is not using POP3, they are not impacted. <\/p>\n

Current status: We\u2019ve begun rolling out the fix and can confirm it has been successfully deployed to approximately 56% of the affected environments. We\u2019ll continue monitoring progress and will provide an updated completion timeline as soon as it\u2019s available. <\/p>\n

Scope of impact: Impact is specific to some users attempting to delete email messages after running the QUIT command using POP3 connection method.<\/p>\n

Root cause: A package version conflict introduced a regression that causes the POP3 QUIT command to fail after a DELE operation.<\/p>\n

Next update by: Monday, January 26, 2026, at 11:00 AM UTC<\/td>\n<\/tr>\n

Machine Translation<\/th>\n\u30bf\u30a4\u30c8\u30eb:POP3\u63a5\u7d9a\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001QUIT\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u5f8c\u306b\u30e1\u30fc\u30eb\u3092\u524a\u9664\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5f71\u97ff:POP3\u63a5\u7d9a\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001QUIT\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u5f8c\u306b\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u524a\u9664\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u8a73\u7d30\u60c5\u5831:\u5177\u4f53\u7684\u306b\u306f\u3001POP3\u30e6\u30fc\u30b6\u30fc\u306f\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8aad\u307f\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u304c\u3001\u524a\u9664\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u6b63\u3057\u304f\u9589\u3058\u306a\u3044\u305f\u3081\u3001\u5b9f\u969b\u306b\u306f\u524a\u9664\u3055\u308c\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002DELE\u30b3\u30de\u30f3\u30c9\u3067Exchange Online\u3067\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u524a\u9664\u3055\u308c\u308b\u3068\u3001POP3\u306eQUIT\u30b3\u30de\u30f3\u30c9\u304c\u5931\u6557\u3057\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u304d\u308c\u3044\u306b\u9589\u3058\u3089\u308c\u305a\u3001\u524a\u9664\u6307\u5b9a\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u6b8b\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u304cPOP3\u3092\u4f7f\u7528\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u5f71\u97ff\u3092\u53d7\u3051\u307e\u305b\u3093\u3002<\/p>\n

\u73fe\u72b6:\u4fee\u6b63\u306e\u5c55\u958b\u3092\u958b\u59cb\u3057\u3066\u304a\u308a\u3001\u5f71\u97ff\u3092\u53d7\u3051\u305f\u74b0\u5883\u306e\u7d0456%\u306b\u7121\u4e8b\u306b\u5c0e\u5165\u3055\u308c\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u9032\u6357\u3092\u5f15\u304d\u7d9a\u304d\u76e3\u8996\u3057\u3001\u5b8c\u4e86\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u304c\u78ba\u8a8d\u3055\u308c\u6b21\u7b2c\u3001\u66f4\u65b0\u3092\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2:\u5f71\u97ff\u306fPOP3\u63a5\u7d9a\u65b9\u6cd5\u3067QUIT\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u305f\u5f8c\u306b\u30e1\u30fc\u30eb\u3092\u524a\u9664\u3057\u3088\u3046\u3068\u3059\u308b\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u7279\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u6839\u672c\u539f\u56e0:\u30d1\u30c3\u30b1\u30fc\u30b8\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u7af6\u5408\u306b\u3088\u308a\u3001DELE\u64cd\u4f5c\u5f8c\u306bPOP3 QUIT\u30b3\u30de\u30f3\u30c9\u304c\u5931\u6557\u3059\u308b\u56de\u5e30\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u6b21\u56de\u66f4\u65b0:2026\u5e741\u670826\u65e5\u6708\u66dc\u65e5 \u5348\u524d11:00 UTC<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

EX1221076 | Exchange Online | Users may be unable to delete email messages after running the QUIT command when […]<\/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-14650","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14650","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=14650"}],"version-history":[{"count":0,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/posts\/14650\/revisions"}],"wp:attachment":[{"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/media?parent=14650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/categories?post=14650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m365jp.net\/index.php\/wp-json\/wp\/v2\/tags?post=14650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}