Hi Asif,
You didn't mention which version of Outlook you are using, or whether or not your attached to an Exchange server. Please take a look at the following Knowledge Base article which deals with
delayed delivery options.
196072.KB.EN-US
OL2000: (CW) Setting Delayed Delivery Options For Exchange Mail
You can access this article by clicking on the link below.
http://support.microsoft.com/default.aspx?scid=KB;EN-US;196072
Regards,
Scott Atkins MCSE, MCSA
Partner Technical Lead - Outlook
Microsoft Technical Support
for Platforms and Business Applications
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