Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity.

Subject 'test attachment'
Server: 'SMTP.charter.net'
Windows Live Mail Error ID: 0x800CCC0F
Protocol: SMTP
Port: 25
Secure(SSL): No

I have run the windows essentials fix. did not work. uninstalled and reinstalled windows essentials. checked my antivirus. I have 2 desktops and a Microsoft surface all on Ethernet network. none of them can send attachments. I can send attachments thru charter.net mail website.