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If I have my Outlook 2003 client is closed when the email is intended to be sent, will the email still be sent?

Is it a function of the Exchange Server or my Outlook 2003 client?

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What about if I leave it open in my session on a Termserver? – leeand00 Mar 6 '13 at 15:08
If Outlook is closed then the delayed email is never sent. It would only be sent once Outlook was started. You can confirm this yourself by delaying an email 5 minutes and checking when the server recieved it. – Ramhound Mar 6 '13 at 15:15
@leeand00 - Sorry, I deleted my comment by mistake but it said "You can try this yourself by attaching a large document to your file, click send and then close Outlook. Return in 1 hours time, the file will remain in the outbox). – Dave Mar 6 '13 at 15:16
up vote 3 down vote accepted

This depends if you are running your Outlook client in cached Exchange mode or not.

Cached Exchange mode: Outlook must be open for the delayed send to occur at the designated time.

Online mode: Outlook can be closed (and the PC even shut down) and delayed send will still work- it is stored and sent by the Exchange server.

"This is expected. The problem is that (in cached mode) if the message were to be pushed to the Exchange server you would no longer be able to re-edit it or stop it from being sent without restarting Outlook in online mode. Since many people set up a rule to delay sending all messages by a few minutes (to prevent that "Oh dang! I didn't mean to send that yet!" mistake), we decided that the behavior you're experiencing was the preferred one. If you leave Outlook running, though, it will send the message at the proper time".

-- Jeff Stephenson (Outlook Development)

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