Reject message Hotmail mail server limits message from Zoho. ResponseCode 421, RP-001

Reject message Hotmail mail server limits message from Zoho. ResponseCode 421, RP-001


Hi, after sending to a hotmail.com email account, 


I recive this reject message:

    ----- The following addresses had fatal errors -----   

   [Status: Error, Address: <xxxxxx@hotmail.com>, ResponseCode 421, RP-001 (BAY004-MC6F6) Unfortunately, some messages from 135.84.80.217 weren't sent. Please try again. We have limits for how many messages can be sent per hour and per day. You can also refer to http://mail.live.com/mail/troubleshooting.aspx#errors.]


Thanks for your help.


--

Brian