Dear
We have 2 x Exchange 2003 (FE & BE), during Exchange 2003/2010 mail flow issue, we delete then recreate send connector (to Smart host->Internet) and the (Ex2k3/Ex2k10-HT) servers routing group connectors
After that all mail flow working fine (between 2k3 & 2k10/ and outside/inside). Only we start getting Event logs on FE and BE with the below details :
Event Type: Warning
Event Source: MSExchangeMTA
Event Category: Security
Event ID: 9297
Date: 6/4/2013
Time: 7:00:53 AM
User: N/A
Computer: BE
Description:
Calling client thread does not have permission to use MTA RPCs. Windows 2000 error code: 0X80070005. Client user account: NT AUTHORITY\ANONYMOUS LOGON. [BASE IL INCOMING RPC 29 237] (14)
When I gave the Anonymous SendAs/ReceiveAs permission it stop EventID 9297 and log event 9322, so i revert back. We don't have name resolution issue or communication issue between BE/FE servers