Article ID: 126098, created on Jul 7, 2015, last review on Jun 17, 2016

  • Applies to:
  • Plesk 12.0 for Windows


Autoreply doesn't work with auto-reply enabled and no reply is received. No errors found. Instructions provided in the KB article at not helped, no issues found. But after enabling Plesk debug as it described in this article.

The following error will appear in the Plesk section of Windows Event logs or in %plesk_dir%\admin\logs\plesklog_debug<yyymmdd>.log

2015/07/06 09:56:09:895 5548 6008 Info: CPleskMEMTA::Execute 2FD06171A7D143E4AF843BB51554858A.MAI SMTP
2015/07/06 09:56:09:895 6908 7016 Info: Plesk Management service pipe communication error: No process is on the other end of the pipe. (Error code 233) at Unable to write to pipe
   at (Con::OverlappedPipe::beginWrite line 358). Trying to reconnect.
2015/07/06 09:56:09:895 5548 6008 Warning: Can't decrypt data
   at (plesksrv::processQuery line 268)
   at Pipe channel(vpipechannel::onConnected line 120)
   at getProtectedData('srsSecretKey')(PleskSrvClient::getProtectedData line 747)
   at Process mail filter query(MailFilterChannel::processQuery line 281)
   at (MailFilterChannel::processQuery line 284)
   at Pipe channel(vpipechannel::onConnected line 120)
   at processAllFiltersOptimized(C:\Program Files (x86)\Parallels\Plesk\Mail Servers\Mail Enable\Queues\SMTP\Inbound\Messages\2FD06171A7D143E4AF843BB51554858A.MAI)(MailFilterPipeClient::processAllFiltersOptimized line 90)


Corrupted registry key


  1. Open regedit
  2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\PLESK\PSA Config\Config\
  3. Find key ProtectedData
  4. Remove or rename it

It will be re-created automatically on next start of Plesk mail filter.

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Plesk Auto-Reply

ed7be2b984f9c27de1d2dc349dc19c6d 56797cefb1efc9130f7c48a7d1db0f0c a914db3fdc7a53ddcfd1b2db8f5a1b9c 85a92ca67f2200d36506862eaa6ed6b8 a766cea0c28e23e978fa78ef81918ab8

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