Dear all,
Current setup:
Exchange 2013 CAS - 2 units
Exchange 2013 Mailbox - 2 units
Issue:
User frequently receive notification on Outlook for undeliverable email as below. Previously no issue like this happened:
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Remote Server returned '554 5.6.0 An unexpected error was encountered during submission of this mail. Error reference number = 18577986.'
Original message headers:
Received: from VMEXMB01.xxx.xxx.my ([fe80::88da:acf7:c7c:b5b0]) by
VMEXMB01.xxx.xxx.my ([fe80::88da:acf7:c7c:b5b0%16]) with mapi id
15.00.1395.000; Thu, 8 Nov 2018 17:35:06 +0800
MIME-Version: 1.0
Content-Type: text/plain
Date: Thu, 8 Nov 2018 17:35:06 +0800
X-MS-Exchange-Transport-FromEntityHeader: Hosted
Message-ID: <207c29faeb614e50b19c3f01b6a2eec2@VMEXMB01.xxx.xxx.my>
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Any clue for the issue?
Regards,
Azanne