Email Related Questions - Why aren't emails delivered immediately?
Outlook
Outlook sends email one after another. If you have many emails, it may take some time to deliver all of them.
[Microsoft Exchange]
Exchange delivers email every few minutes. You can force it to send a message by starting up Exchange and selecting Tools 
Deliver Now from the menu.
If your mail comes back saying Unable to deliver the
message...
- Make sure you have correctly configured your mailbox, and when you are asked to "please choose a mail profile," you select the correct option.
- If you use Outlook, you might not be sending the message correctly. Check the addresses you have chosen to receive your message.
- If you use Exchange, use the Start menu Settings Control panel Mail and Fax. Make sure you're not accidentally faxing your email messages!
- If you use Notes or cc:Mail, check that the network is mapped properly and that your win.ini file has the section:
[LotusMail]
ProgramPath=m:\ccmail\wmail.exe
- If you use a remote email connection, you will have to
dial into your mail server to send messages.