Email Formats Problem

Hello

We are using Zoho creator to maintain the complaints. In the Zoho creator the mails are sent on several phases. Till couple of days back the mails were coming properly in HTML, table, color etc format.

Now these mails are not coming in formatted way. Is there any problem with the mail system of Zoho??

Please suggests some solution as the complaint logging system is live and it is causing the inconvenience.

Thanks in advance.

Umesh