Microsoft to discontinue DeltaSync (for Windows Live Mail)
A good friend of mine got the following email today:
Important information about your email service
In a few weeks, we will be making some changes to our email services that might impact your @outlook.com, @hotmail, @live, or @msn email account. Those changes will prevent your email from being delivered to the Windows Live Mail 2012 application you use.
In order to continue using Windows Live Mail 2012 to send and receive email for your account, you need to install the latest update published here.
If you use Windows Live Mail 2012 on Windows 8, Windows 8.1 or Windows 10, we recommend that you switch to the built in Mail app in Windows to stay connected and get the latest feature updates on Windows 8, Windows 8.1, and Windows 10.
Windows Live Essentials 2009 and 2011 are not supported anymore, and you will need to update to Windows 8/8.1 or Windows 10 and use the Mail app, or use www.outlook.com. To learn more about the Mail app, please click here.
We also recommend all Windows Live Mail users on Windows 7, Windows 8, and Windows 8.1 to upgrade to Windows 10 and use the built in Mail application to stay connected and get the latest feature updates.
We suggest saving this email so you can refer to it later.
Thanks for your understanding and continued use.
The Outlook team
Although not officially mentioned in the message, Windows Live Mail 2012 uses the DeltaSync protocol to send and receive email for Outlook.com/Hotmail accounts, so it can be assumed that they are discontinuing this protocol. Prior to DeltaSync’s creation, Outlook Express used WebDAV, which itself was shut down in 2009.
As much as I can tell, after installing this patch, Live Mail will no longer work on Windows 10. Live Mail opens up, but within seconds it crashes:
Additionally, the Exchange ActiveSync support is extremely rudimentary and fixes none of the existing issues with mail notifications.
I’ve continued and elaborated my discoveries, as well as how to revert the patch on my next post.