Unable to send message;Reason:550 5.4.6 Mail rate exceeded limit

Unable to send message;Reason:550 5.4.6 Mail rate exceeded limit

Hey Zoho Support,
Can you please unlock my account.  I keep getting Unable to send message;Reason:550 5.4.6 Mail rate exceeded limit error.  By accident, one of my team members send Hiring mail to 30 people with same requirements.


apatel@jaspersolutions.com
gethired@jaspersolutions.com

Please expedite this process if you can. Thank you

Andy