Windows live mail- Can receive, can’t send

Hi,

My windows Live Mail has just failed to send emails for the 4th time this week.

My ISP in Virgin.

I get the following error message:

"An unknown error has occurred.

Server: 'smtp.blueyonder.co.uk'
Windows Live Mail Error ID: 0x8007007A
Protocol: SMTP
Port: 25
Secure(SSL): No"

I can only receive.

I can send and receive on Virgin Email.

Thanks,

Rod

* Moved from Windows 7/Apps

* Original title: Windows live mail on Windows 7