We are using zoho support for our ticketing system, but now we are not able to reply from zoho. We are getting a message "Sending failed"

Here is the email which we got :

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Dear User,

We regret to inform you that your email outgoing has been blocked and you will not be able to send further emails.This was done in accordance with the Zoho Mail  Usage policy .

Reason for the block :  Mail Recipient count exceeds limit [Recipients=161]

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.

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Could you please check this and let us know what we need to do with our account?

Thanks in advance