Event ID - 4182

Event Id4182
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:
CAUSE The Internet Mail Service submits a message to the information store, which in turn parses the addresses to get the corresponding display names. It detects the corrupted address and generates MAPI_E_CALL_FAILED, but later this error is overwritten as MAPI_E_NOT_ENOUGH_MEMORY.
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5.
Reference LinksInternet Mail Service Stops with Event IDs 4182, 12800

Events 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 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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