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

Hi

I am very concerned that my email account has been blocked. I need to regularly send emails out to members of my organisation as I have to keep them informed of forthcoming events and activities that are of importance to them.

I am most certainly not sending out spam email as I have permission to contact these people and there are times when this will occur on a daily basis.  I deliberately chose to use Zoho email as I wanted to specifically to be able to do this and I am disappointed to find that I am having difficulties.

Can my email account: newporteastclp@newporteastlabour.co.uk be unblocked please

Thank you
Deb Davies