Control Outbound queue

[elenlace]

Hello,

I was wondering if there is a way to control the outbound queue in Mailenable on a per-domain basis, similar to what Cpanel accomplishes where you can limit the number of e-mails a domain can send per hour.

I have a customer that is sending a newsletter in business hours and he is flooding the outbound queue and causing other customers not to be able to send e-mail.

I have:

MailEnable 1.98
Plesk 8.1

Your help is greatly appreciated.

Warmest Regards!