I recently started having problems with Windows Live Mail.  I receive the following:

An unknown error has occurred.

Server: 'smtp.windstream.net'

Windows Live Mail Error ID: 0x8007007A

Protocol: SMTP

Port: 25

Secure(SSL): No

I can't send photos from the OneDrive or any older photos from my PC.  I have Windows Essentials 2012 on Windows 10 Home.