文档介绍：Outlook打开邮件速度很慢的解决办法
1) Do NOT use MS Word as the message editor
  Tools - Options - Mail Format tab
  Uncheck the Use Microsoft Office Word 2003 to edit e-mail messages checkbox
  Uncheck the Use Microsoft Office Word 2003 to read Rich Text e-mail messages checkbox
不要使用微软Word作为信息编辑
工具-选项-邮件格式选项卡
词的使用微软办公室复选框编辑电子邮件讯息2003年复选框
词的使用微软办公室取消2003年丰富的文本阅读电子邮件”复选框
2) Turn off the Reading Pane
View - Reading Pane - Off
关掉阅读窗格
查看-阅读窗格-关闭
3) Check your PST file size, if it is more than 1GB or even 2GB,Please consider to split it into two or more PSTfiles.
检查你的PST文件大小,如果超过1GB的或2GB,请考虑将它分割成两个或两个以上的PSTfiles。
4) Check the size of the slow mail's attachment(s),  If the attachment is very big, for example morethan 3MB, then it is normal to be opened slowly.
检查邮件的大小的缓慢附件(s),如果本合同附件是非常大的,例如现3MB的话,那将是很正常,你要慢慢开启。
5) Uninstall any plug-in of Outlook,  For example, some screen capturing tool, desktop search toolbar, skin setting...
卸载任何展望的插件, 例如,一些屏幕捕捉工具,桌面搜索工具栏,皮肤设定
6) Windows\System32\ file may be old or corrupted,Try to copy an file to replaceyours.
System32 \ \文件可能老或损坏,
7) Change the Cached Exchange Mode
  Tools - E-mail Accounts...Choose the View orchange existing e-mail accounts option (it is the default), click Next,
  Click the Change... button,
  Clear the Use Cached Exchange Mode checkbox, ofcheck it if