Hi there,
I saw your project and it is quite interesting, in fact, I have built exactly the very same project you have posted a couple of times, for different customers. It is very common that clients ask to export Outlook assets to external servers.
I can export any asset from Outlook to any external server. I build an Outlook extension which takes care of reading and extracting the data you select, and a server side script in any language (ASPX, PHP, Java, etc) so the Outlook extension can communicate with and upload the required data.
As I told you before, I have several extensions like this one you ask already developed. So, if you allow me I can send you a demo or some screenshots to show you how it works from the user perspective and internally, how they are built, what technology they use, etc. And obviously, I can take any of those already-built projects and customize them to your needs, with the features you need. Also, the email exporters include extraction of email attachments, compression of attachments and uploading of email attachments to your server. The emails can be stored in the server to a database or to the file system (eml format).
Well, I think that is all, I placed 5 days on my bid, 3 to deliver your project and 2 more just in case you need anything else. If you have any question just send a message, no compromise.
J.