Error

Error #0371: the user is blocked or fired. Perhaps your message won't be read (UIN XXX)
 

Error description

After attempting to send a private message, the server notifies that your subscriber's account is blocked and they probably won't get and read your message.


Physically this message is sent and saved in history but it just won't be delivered and read.


Problem solution

Unblock your subscriber's account by using the Admin Panel on the server, the section "Users".


Or send a message to the correct subscriber.