Outgoing email blocked

Dear Sir/madam,

My account "m.tahir@ophelia-international.com" has outgoing blocked because I sent an email with lots of emails and I think ZOHO team considered it as spam email. Therefore they blocked my outgoing. Please let me know the procedure how can I unblock my outgoing service.
I will be grateful to you for your quick and positive response.

Thanks a lot.

Muhammad Tahir