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Run SMTP and POP3 on single Echange server

Posted on 2008-06-17
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I have Windows 2003 SP2 domain with a primary domain controller and a backup domain controller.  I also have a single Exchange 2003 SP2 server currently running SMTP.  We have need to run some third party apps that only use POP3.  Can I run SMTP and POP3 (the service is currently disabled) at the same time and if so how do I configure it and what are the implications of email being pulled off the server by the third party app and thus not available to the user.  I am begginer in Exchange administration so please be kind and thorough. I realize this could be a stupid question to some of you.
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Question by:BrianSDG
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cshepfam earned 2000 total points
ID: 21804473
You can run both on Exchange.  All you have to do is go to Start > Run > services.msc

and start the Microsoft Exchange POP3 service.

Then go to Exchange System Manager, expand Administrative Groups > First Administrative Group > Servers > Your Server > Protocols > POP3

and start the Default POP3 Virtual Server.


For the users hitting Exchange via POP3, they will pull all their email off the server (unless you specify during their email setup to leave a copy of their email on the server)

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Author Comment

by:BrianSDG
ID: 21804638
Great!  Since I already have the users setup, how do I configure their mailbox to leave a copy on the server?
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by:cshepfam
ID: 21805221
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by:cshepfam
ID: 21805232
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by:BrianSDG
ID: 21805869
Sorry, I should have been more specific in my follow up question.  I know how to leave a copy of email on the server from the client but is it possible to force the issue from the server side.  I ask because, as mentioned above, we have some third party (offsite vendor) software that will be accessing the mailbox and I would like to force the issue of leaving copies of emails on the server if at all possible so the vendor does not end up with all the email.
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Expert Comment

by:cshepfam
ID: 21805892
Through Exchange?  I don't think it's possible.  It can only be done on the clients side.
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Author Closing Comment

by:BrianSDG
ID: 31468003
Great job, thanks!
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