Event ID - 4102

Event Id4102
DescriptionA serious error has occurred while trying to send mail into the Exchange Information Store. The Internet Mail Service is being shut down.
Event InformationAccording to Microsoft:
This problem may occur because Exchange Server may be in a low-memory condition. This situation may be experienced when almost no virtual address space is available for virtual memory.
To resolve this problem, use the following methods in the order in which they are presented. Test to check whether the problem is resolved after you complete each method. If the problem continues to occur, go to the next method.
Method 1: Apply the /3GB switch.
Method 2: Apply the information store hotfix.
Reference LinksEvents 12800, 4182, and 4102 may be logged, and Internet Mail Service may stop responding in Exchange Server 5.5

XFOR: Internet Mail Service Stops with Event IDs 4102 and 4182

The Internet Mail Service may quit if the Information Store runs out of memory in Exchange Server 5.5

The information store crashes, and the Internet Mail Service may stop responding when you use SpamAssassin to process incoming e-mail messages in Exchange Server 5.5

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