I have sent 31 messages over about 1 month.  90% of them have been to craigslist ads, as I am searching for a job.  I am applying now, and time is of the essence.

On my second message of the day, I was blocked.   

Hey there,

To properly investigate your issue, please post your complete Hotmail email address.  You can also check out the solution article below as it tackles your concern.

http://windowslivehelp.com/solutions/sendlimits/archive/2009/01/28/This-account-is-currently-blocked-from-sending-messages.aspx