[BlueOnyx:26615] email issue

[Barry Mishkind]

Howdy.
BX 5209r

Today, I  saw a message I'd never seen before telling me I was 
blocked at 8:02 AM CST for having sent 1650 messages. "Wait until tomorrow"

Of course, I've never sent that many messages, but it does appear in 
the BX GUI that something happened twice today, in the morning and 
after I reset the limit.

Is this someone finding a hole to relay through?  I tried reading the 
var/log/maillog, but got lost. Not sure what I am looking for.

thanks