By default, in Exchange 2007 Service Pack 1 (SP1), the hard disk drive that holds the message queue database must have at least 500 MB of free space.

• 默认情况下,在Exchange 2007 Service Pack 1(SP1)中,存储邮件队列数据库的硬盘驱动器上必须有至少500 MB的可用空间。