Hi Barath, thanks for you answer.
The problem is not
"Mail Rate Exceeded Limit" , is the
554 5.1.8 Address of the sender blocked, we can send mails to certain recipients, but not others. If we do the procedure you tell us, we can not click because we do not get any links, the problem is different. We are several users of our blocked, we try to find the problom, but its really difficult, I need help very quicly, thanks for you answer.