Finding out what the root mailbox is for our domain

[Stevos]

Hi there,

Another question: How do i go about finding out what the root mailbox is for our domain? Our ISP is using a catch all alias to forward our mail to a 'root' mailbox that will re-distribute the mail according to user. Except, i've looked everywhere for the address, and i have no idea where i can get it!

Any help would be heaps appreciated.

Thanks again,
Steve