Default e-mail program in windows 10

1.    Open the Control Panel:

2.    In the Control Panel dialog box, in the Search Control Panel textbox, enter Default and choose Default Programs:

Default program Windows 10
3.    On the next screen, click Associate a File Type or Protocol with a program link:
Associate a File Type Windows 10

4.    On the Associate a file type or protocol with a specific program screen, scroll down the list until you find Protocols:

Protocols Windows 10
5.    Under Protocols, choose MAILTO and then double-click it:
MailTo Windows 10

 6.    Choose the client you prefer:

Choose default mail client Windows 10

7.    Click OK.

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