Event ID - 12007

Event Id12007
SourceMSExchangeIS
DescriptionError 0-82000080 occurred while processing message (Long Message ID) with subject (The subject of the message) from (Senders Name). The archive filename is VMS95LCZ. The Internet Mail Service may stop processing inbound or outbound SMTP mail and may stop responding (hang) in an uncontrollable state. If you attempt to restart the Internet Mail Service, the information store may stop responding then this error message is generated
Event InformationThe Internet Mail Service may stop processing inbound or outbound SMTP mail and may stop responding (hang) in an uncontrollable state. If you attempt to restart the Internet Mail Service, the information store may stop responding and one this error message, along with few more events, may be generated To resolve this issue: 
1) Use the error messages that are generated to identify the message IDs of the malformed messages.
2) In Windows Explorer, locate the Imcdata\In and Imcdata\Out folders and either move or delete the messages that you identified as malformed. Search for messages that come from the same domain name. (In one situation where this issue occurred, all of the malformed messages came from one domain.)
3) Either apply the information store post-Exchange Server 5.5 Service Pack 3 (SP3) fix or upgrade the information store to version 2653.22 or later. The best way to upgrade the information store is to apply Exchange Server 5.5 Service Pack 4 (SP4).
4) Restart the Internet Mail Service and see if the information store keeps running and if messages are processed successfully.
5) If the Internet Mail Service brings in more malformed messages that may cause the information store to hang again, change the Internet Mail Service to outbound only:
a) Open the Internet Mail Service properties, and then click the Connections tab.
b) Under Transfer Mode, click Outbound only.
c) Click OK, and then and stop and restart the Internet Mail Service.
6) Restart the Internet Mail Service. If the information store keeps running and processes all messages, reconfigure the Internet Mail Service to both inbound and outbound.
7) Identify the malformed messages again (see st
Reference LinksXFOR: Malformed SMTP Messages in the Internet Mail Service

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