I've added an IMAP account provided by an institutional server (****@fidas.org). I've checked that sent items are stored correctly when working on Windows Live Mail or from webmail.

This is not the case with the new Windows 10 metro mail app, sent emails don't show in any of the sent folders I've created.

I've been struggling with the issue for quite a long time. My mail provider does not know where the issue might be. I believe it is somehow related to the name the windows mail app gives to the folder for sent items. If I knew the exact name of that folder I could create a folder with that name through the webmail page and finally have all of my devices properly sync.

I've talked to the technical service and they adviced me to switch to another mail provider app. I would prefer not to do that because I like the integration with People and other windows apps.

Thank you.