An unexpected error has occurred which may cause the MTA to terminate. Error: . [ ] (16)

Details
Product: Exchange
Event ID: 9405
Source: MSExchangeMTA
Version: 6.5.6940.0
Component: Microsoft Exchange Message Transfer Agent
Message: An unexpected error has occurred which may cause the MTA to terminate. Error: <error code>. [<value> <value> <value>] (16)
   
Explanation

The Microsoft Exchange Server disk may be full or a disk error may have occurred. The message transfer agent (MTA) service will stop if the disk is full.

The MTA may have shut down unexpectedly because of a problem with another dependent service. Check Event Viewer for related problems.

   
User Action
  • If the Microsoft Exchange Server disk is full, delete any unnecessary files. If you suspect a disk error, run Chkdsk.
  • Verify that the \Exchsrvr\Mtadata directory exists. Stop and restart the 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. Contact Microsoft Product Support Services for assistance.
  • Also, verify that the Information store service is started and that a private information store is mounted.

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