Windows 10: How to change the protocol used by the Mail Application in Windows 10 from IMAP to POP3?

I wanted a way to change the protocol used by the Mail Application in Windows 10 for all my accounts, Gmail as well as Hotmail and Outlook. Is there any way I can change the protocol?

:)

 

Solution to Windows 10 Mail not correctly recognizing IMAP mail accounts

When setting up a new mail account in the new Windows 10 Mail app, some providers are recognized as POP3 servers automatically, regardless that they offer IMAP as well.

This is due to the fact that when the app prompts the user for an address to be associatied with the new account, it automatically checks the servers present at the address, and may stick to the POP server instead of the IMAP one.

It is impossible to manually define the server from the beginning. It is also impossible to do this offline and change the settings before the app connects to the server, as this leads to a connectivity error.

For some users, this may lead to two very unpleasant behaviors:

• The account will be handled as POP3; Mail automatically downloads ALL the messages from at least the last three months, marking them as unread. Combined with the fact that there is no possibility to select all messages to mark them read, this can be very painful. [Note: The ability to select all messages has been added since December 2015; the issue of this question has not been touched, though]
  
• When you try to change the server address to the IMAP address of your provider, syncing will fail completely, even if you specify the correct ports and SSL (e.g. imap.mail.org:997:1). The errors 0x80072726 or 0x8007274d may be shown. This might be attributed to the fact that you don't have the possibility to specify the protocol anymore at this point.
  

 

So now there's no way to get a @live account to work with Windows Live Mail now?

you should be able to manually configure pop3/imap for it. the windows 10 mail app defaults to activesync which is what Microsoft wants for all their mail connectors.
Outlook help & learning - Office Support

 

Win 10 Mail


The MyDomain Knowledgebase Email page lists the IMAP or POP protocol items; while the Windows 8 Phone specific reference shows the exact steps for the Windows 10 Mail app configuration.

MyDomain isn't hosted on Outlook.com; it uses either IMAP or POP3 protocols from its own hosted servers. Because you said you had it configured for POP3, all email history is retained on the server. (IMAP offers the option of removing messages from the server when deleted from your local PC.)

So, W10 Mail use of the AppData folders is purely transient; it doesn't retain any history once the app is closed. The WinMail folder you're referencing must be present in your MyDomain email account -- which you will likely see, once the MyDomain servers recognize your account configuration and one-time download all existing messages. (IIRC, POP3 shouldn't download duplicates of ones you already have downloaded previously.)