| Event Id | 3123 |
| Source | MSExchangeMTA |
| Description | An internal MTA error occurred. Unknown entity <object name>. [<value> <value> <value> <value>] (14) |
| Event Information | Stop and restart the message transfer agent (MTA) service. If the error persists, run the Mtacheck.exe utility. Stop the MTA service, open a command prompt, and type Mtacheck/v /f c:\mta.txt. If Mtacheck removes objects from a database queue, it places each damaged object in a Db*.dat file in \Exchsrvr\Mtadata\Mtacheck.out. |
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