Plugin have a bug related to content type

I have created a website and its emails are working absolutely fine on the staging server.

When we configure the ZOHO mail on the live server, the emails taht have the content type as “text/html” are sending the *Row* HTML to the email client.

I have troubleshoot the issue with the plugin and found that the zoho plugin has reset the “mailFormat” to “plaintext” instead of html.

So, when i change the mailtype in line #578 to “html”, the emails are working fine.

It might be caused due to the assign NULL to $content_type in various places in the plugin.

Please check the plugin’s next version with the text/html content type.

P.S. this you can consider to reproduce the issue:
I have tested this with MetForm, Contact form 7, etc.
The form does not contain any attachment.