I keep getting this message every time I try to send an email - Its been happening for a few days now - never had a problem before and I can receive emails ok.  Also when I go into sent items all the emails I have sent previously have disappeared  - there used to be a long list of them!

Server Error: 530
Server Response: 530 5.7.0 Must issue a STARTTLS command first
Server: 'smtp.live.com'
Windows Live Mail Error ID: 0x800CCC78
Protocol: SMTP
Port: 25
Secure(SSL): No

Original Title: windows live won't send emails