Suddenly I am unable to send multiple attachments using windows live mail.  I have been sending attachments for several years with this program with no problems.  I can receive and send mail with no attachments.  Here is the error message I get 

An unknown error has occurred.

Server: 'smtp.gmail.com'
Windows Live Mail Error ID: 0x8007007A
Protocol: SMTP
Port: 465
Secure(SSL): Yes

I have tried changing the port- didn't work

I'm using a google mail account and I have tried using the internet google mail to send the attachments and it works just fine from there.