Windows 10: Windows 10 Mail App with EAS (ActiveSync) issue causes emails not being sent and disappear

Hi,


When using Windows 10 Mail App with an e-mail account setup using EAS ActiveSync, if we send some emails in a fast way (2/3 seconds between them) some of the emails will not be sent and will simple disappear.



To reproduce the issue, follow the bellow steps:



1. Add an email account using EAS ActiveSync protocol.

2. Send 6 emails in a fast way (2 or 3 seconds max time between them).
3. Check the sent folder. You will see that some emails are missing.
4. You can also check the recipient email address to confirm you did not receive all the emails.


NOTE 1: I have made the same test using IMAP and the issue does not happen. It only happens with EAS ActiveSync.



Can anyone please test from your end to confirm if this is a bug? Also, anyone here from Microsoft support?



Need help resolving this issue.



Thanks

:)

 

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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.