Zoho stopped sending emails

I have an application that relies on sending emails. As of this morning Zoho has stopped sending my emails.

I made edits to the code a few days ago but other than that have not touched it and processed records for days with no problem and with emails successfully being sent. Now my blogs do not appear to be receiving emails from Zoho either on successful submission of a form or upon the update of a certain field as they previously have.

My application is called PRIZEY and it is shared for assistance. Please help. This problem would quickly kill my site if it could not be resolved - my workflow relies entirely upon the sendmail function in Zoho Creator.