Protocol logs track the commands an SMTP virtual server receives from SMTP clients, as well as outgoing commands.
Four formats are available for tracking. When choosing a format, decide what you want to track and how you want to review the data.
The default format is W3C Extended Log File Format. For three of the formats (all except ODBC), transactions are written to a text file. You can determine the logging period and maximum size of the file. When the size limit is reached, a new file is created. Back up and remove older files so the system doesn't run out of disk space when writing to the current transaction log file. The ODBC format, however, writes directly to a database.
Note Plan what you want to track for all the services, how many files to use, and how to set file size before choosing a format for SMTP.
Related Topics
Log Formats Planning Protocol Logs