ISP mailbox traffic shows default values

Under Email tab is Statistics tab with Mailbox traffic option. After click it I see table with listed mailboxes and value 0kb for each column - this month, last month, this year, last year. Shouldn't be there some values in MB/GB?

PS
Btw, some filtering in this table (and each in ISP) would be nice.
Is it possible to set some limit on sending mail for particular mail account? Some kind of "outgoing mail control".

 

I get statics shown, with reasonable values. This is on Perfect Servers host, I do not remember doing anything extra related to statistics.
I can even filter by e-mail address.
I believe postfix does not have option to limit how much mail an account can send. Adding policyd policy deamon gives that option, but I have never used it.

 

In my case it looks like on the attached file. Of course also Perfect Server host.

 

Do you know for sure there has been traffing from and to those mailboxes? Is you setup multiserver?

 

I have single server under ISP and yes - there is a lot of mails to and from these mailboxes.