Sure. From cli, gets these results running -day 6 -month 8.
# pmgsh get statistics/mail -day 6 -month 8
200 OK
{
"avptime" : 3.36122643455145,
"bounces_in" : 676,
"bounces_out" : 0,
"bytes_in" : 1192195456,
"bytes_out" : 1167700480,
"count" : 26769,
"count_in" : 21169...