A few weeks ago, we are having this problem:

"Dear User,

Mail Outgoing blocked. Reason :Mail rate exceeded limit

However, we realize that this might have been unintentional. To unblock, please click here.

Thanks,
Zoho Mail Team

P.S.: This is an auto-generated message. Please do not reply to this email. "

We have noticed about mails in our Sent Folder that have not been sent by this account which causes that "Mail rate excedded"

Please coul you help us to solve this issue?

Thanks in advance.