{"id":14619,"date":"2026-01-22T22:00:57","date_gmt":"2026-01-22T13:00:57","guid":{"rendered":"https:\/\/m365jp.net\/?p=14619"},"modified":"2026-01-22T22:01:06","modified_gmt":"2026-01-22T13:01:06","slug":"servicedegradation-ex1221076-exchange-online-users-may-be-unable-to-delete-email-messages-after-running-the-quit-command-when-pop3-connection-method-is-used","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-01-22-servicedegradation-ex1221076-exchange-online-users-may-be-unable-to-delete-email-messages-after-running-the-quit-command-when-pop3-connection-method-is-used","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\/22\/2026 12:08:36<\/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 identified an issue where a recent update introduced a conflict that prevents the POP3 QUIT command from completing after a message is deleted. We’ve validated a fix in our test environment and initiated a deployment to affected users. The deployment is progressing through a gradual rollout and we expect full completion within the next 24 to 48 hours. <\/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: Friday, January 23, 2026, at 10:00 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\u5728\u306e\u72b6\u6cc1:\u6700\u8fd1\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u524a\u9664\u3055\u308c\u305f\u5f8c\u306bPOP3\u306eQUIT\u30b3\u30de\u30f3\u30c9\u304c\u5b8c\u4e86\u3057\u306a\u304f\u306a\u308b\u7af6\u5408\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u554f\u984c\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002\u30c6\u30b9\u30c8\u74b0\u5883\u3067\u4fee\u6b63\u3092\u691c\u8a3c\u3057\u3001\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30e6\u30fc\u30b6\u30fc\u3078\u306e\u5c55\u958b\u3092\u958b\u59cb\u3057\u307e\u3057\u305f\u3002\u5c55\u958b\u306f\u6bb5\u968e\u7684\u306b\u9032\u3081\u3089\u308c\u3066\u304a\u308a\u3001\u4eca\u5f8c24\u301c48\u6642\u9593\u4ee5\u5185\u306b\u5b8c\u5168\u5b8c\u7d50\u3092\u671f\u5f85\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

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\u6b21\u56de\u66f4\u65b0:2026\u5e741\u670823\u65e5\u91d1\u66dc\u65e5 \u5348\u524d10\u6642 UTC <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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