【 以下文字转载自 Windows 讨论区 】 发信人: isup (No), 信区: Windows 标 题: Mailbox.pst file 发信站: BBS 未名空间站 (Thu Mar 6 20:44:50 2008) add one Mailbox.pst (almost 900M) file to outlook as a folder. Remove all the emails in the folder and empty the "Deleted" box but the size of file Mailbox.pst does not change. I thought the file size should become smaller because all the emails were removed. What is wrong?