Please post your e-mail address so I can validate if the account has been genuinely blocked or if it’s a false alert. In the meantime, check out the solution article below. This explains why an account is being blocked from sending messages.
http://windowslivehelp.com/solutions/sendlimits/archive/2009/01/28/This-account-is-currently-blocked-from-sending-messages.aspx
BTW, I've moved your post here at the Sending Limits Forum.