Hello,did you ever sent a mail to the particular person with the subject - scheduled report.....
If no,there might be undetected malware on your machine
Using Symantec Endpoint Protection's Network Activity Tool to Identify Suspicious Processes
http://www.symantec.com/docs/TECH92950
Many Unexpected Pop-Ups from Symantec Email Proxy are Displayed
http://www.symantec.com/docs/TECH122425
Else
- go to add remove program
- Select Symantec Endpoint protection , click Change and then Modify
- Uncheck Anti Virus Email Protection and install.
See if you are still getting the error
OR
- Go to \Program Files\Common Files\Symantec Shared\ccEmlPxy.dll.
- If the file is present then rename it to ccEmlPxy.bak and restart the computer.
(If you cannot rename the file,temporarily turn off tamper protection and delete file in safe mode with networking).