Event ID:
1022
Source:
POP3SVC
Message:
DS lookup for user USERNAME, connecting from 192.168.1.1, failed with error 0x80040920.

More information
Event ID:
1023
Source:
POP3SVC
Category:
Content Engine
Message:
Error 0x7d6 occurred while rendering message 0008-0000008949b3 for download for user user@emaildomain.com.

More information
Found 2 records