Outlook 2007: how to import mail messages and folders to new IMAP account from POP3 .pst file?

I am switching from POP3 to IMAP in Outlook 2007 to facilitate using my webmail account from multiple computers.  The webmail is hosted by Network Solutions.  I've tried File-Import in multiple variations, but it doesn't work.  One can create each folder manually, open the pst file and copy messages folder by folder, but the webmail server version shows them as having been received at the time of the import, not the time of the original message.  Any ideas?
Thanks!
NilExpertAsked:
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davorinConnect With a Mentor Commented:
Open-Xchange is also the server that NS is using for hosting.
Plugin OXtender is used only for additional functionalities like Calendar, Contacts or Tasks synchronization between server and outlook, which are not possible by default over IMAP protocol.
It will not help you uploading mails to server.
Have you tried the link I have posted?
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davorinCommented:
If you don't have exchange server to use MAPI you are most probably stuck.
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NilExpertAuthor Commented:
Thanks, but I do have an exchange server.  Just no clue how that helps.  

The internet is full of advice on how to get a gmail account to talk to Outlook, and Network Solutions offers a plug-in through open-exchange.com (called OXtender), but the plug-in seems to be unconfigurable and there's no useful help functionality.  The NS support people don't seem to be able to help.
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davorinCommented:
Have you tried uploader for ms outlook?
http://www.open-xchange.com/en/migration-en
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NilExpertAuthor Commented:
Open-Xchange is the source of the Outlook plug-in that Network Solutions offers.  As NS says:  
"For users who would like to maximize the benefits of nsMail Pro but would rather use their Outlook program to organize their mail, the Outlook Plug-in for nsMail Pro would be perfect. With the combination of IMAP Support from the mailbox, the plug-in will automatically sync your messages, calendar items, tasks, etc. straight into your Outlook software without you doing anything!  The IMAP mailbox will sync the messages and folders, and the Plugin will sync the rest.
Once you setup your IMAP account in Outlook, all you need to do is download the plug-in and login when prompted on Outlook's initial startup - that's it!"

The problem is, it doesn't work.  My firm has a Microsoft Exchange Server (for my office email account), and my personal email account is through a domain I have that is on Network Solutions' shared hosting service.  My problem is just to migrate the old emails and folder structure from the PST file to the IMAP account.  I can do it manually (which is a bore, but feasible), but the webmail interface treats migrated emails as though they are new, i.e. the time stamp is the moment of the transition, not the time of the original email.  It would be nice if the plug-in worked as advertised, but it doesn't, and the support/help function is primitive and ineffective.

Thanks!

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NilExpertAuthor Commented:
Oh, I didn't realize the Open-Xchange/NS connection was that close, so I thought I wouldn't have the access to the Open-Xchange server they mention in their configuration instructions.  Those instructions say:  "In the Server URL field, enter the Open-Xchange Server address. Enter your username in the second field. Enter your password in the third field.  "  Does that mean I can use my NS webmail server (incoming or SMTP?), email address and password for those fields?  (Apologies if this is a really dumb question, and thanks again for your help.)
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davorinCommented:
In url you should use mail.yourdomain.com, for username your full email address (like nilexpert@yourdomain.com) and then password.
Regarding what you said (imap, outlook sync using plug-in) I was guessing you have nsmail pro subscription and OXtender works only with open-xchange, so this should be the server they are using.
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NilExpertAuthor Commented:
OK.  Thank you very much.  I'll give that a try and revert.  Seems to make sense.  Meanwhile, no answer from NS....
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