| Event Id | 143 |
| Source | MSExchangeMTA |
| Description | An error occurred while attempting to route message <message id> to recipient <recipient>. An alternate recipient is not allowed. A non-delivery report will be generated. [<value> <value> <value> <value>] (14) |
| Event Information | The originator of a message set the Recipient Reassignment Prohibited flag in the message and the recipient had an alternate recipient defined. This reassignment failed due to the flag. This behavior is by product design. Verify that the address for the recipient is valid. The Recipient Reassignment Prohibited flag is an extended MAPI call and cannot be set by using Exchange System Manager. To set the flag, you must have an application that uses the extended MAPI call. |
| Reference Links | Microsoft product: Exchange Version: 6.5.6940.0 Event Source: MSExchangeMTA Event ID: 143 |
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