[Dovecot] Plan/Status of MBX support?

[Daniel Watts]

>
> Now the problem is, we have to use the tranditional mbox format with 
> dovecot, as it does not support indexed mbox format, which makes 
> deleting messages costly. Also the long-time file locking (due to the 
> slow operation on the dovecot side) causes our MTA (exim, by the way) 
> holds a huge queue. That drives up the system load to mad (load 
> average above 500 is not unusual in our case).
>
sorry just have to ask - does your server actually WORK at loads of 500?
What kind of usage have you got?