Event ID 1025 (SMTPReceive)
Check what event log level is set for MSExchangeTransport\SmtpReceive, if it's not set to lowest set it to lowest, if it already is lowest there is nothing you can do.
Get-EventLoglevel -server Servername
James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
September 28th, 2011 10:45pm