Emails sent from Zoho are sent from a different address

Emails sent from Zoho are sent from a different address

Hello,
I have reported this issue more than a month ago, had a conference call with you representative, but nothing is fixed until now.
The email function from Zoho does not work properly. The emails come not from the address stated in the form, but from address with @zoho.com, not our company address. They directly fall into spam. 
The whole functionality is totally useless as we cannot email any candidates or clients from Zoho.
Please, fix it as soon as possible.
Thank you 
Miroslava Barcova