An unknown error has occurred.

Subject 'Re: First round at the Crimea Invitational'
Server Error: 550
Server Response: 550 5.2.0 jy4e1n00g0zWxSb05y4eha Message identified as SPAM - Please visit http://www.charter.com/postmaster E5110
Server: 'SMTP.CHARTER.NET'
Windows Live Mail Error ID: 0x800CCC69
Protocol: SMTP
Port: 25
Secure(SSL): No

I don't seem to be able to get rid of this, and it is keeping me from sending mail, any help would be appreciated

Thanks, 

Sharon