System Agent and Mailbox Limits

[Wazzer]

I have implemented mailbox limits on the Private Information Store to control the size of users mailboxes on our Exchange 5.5 Server (Service Pack 2). The System Attendant Mailbox has exceeded the warning limit and prohibit send limit. There is not any settings in the System Attendant's properties to set its own limits as there are with users mailboxes. Will this be a problem? Does the System Attendant require the ability to send/ receive? If so, is there a way round it and can I see what items are in its mailbox. I have scoured Technet + Microsoft's site without success.

Thanks for any help.