Number of different client hosts (IP addresses) used to connect.

This is the total amount of data transfered by ftp downloads.
Units are in KB, MB or GB (KiloBytes, MegaBytes or GigaBytes)

All time related statistics are based on server time.

Here, reported data are: average values (calculated from all data between the first and last email in analyzed range)

Here, reported data are: cumulative sums (calculated from all data between the first and last email in analyzed range)