Unable to Send Ticket Reply as a Contact in Zoho Desk?

Unable to Send Ticket Reply as a Contact in Zoho Desk?

Hi Zoho Desk Team,

I am trying to send a reply to a ticket on behalf of a contact using the Zoho Desk API. My goal is to have the contact's response reflected in the ticket conversation, but I am facing an issue where only the ticket author can comment.

Here’s the API request I am using:

Endpoint:
POST https://desk.zoho.com/api/v1/tickets/{ticketId}/sendReply

Request Body:

{ "channel": "EMAIL", "to": "support@my.zohodesk.com", "fromEmailAddress": "sample@email.com", "contentType": "plainText", "content": "sample comment.", "isForward": "true" }

Error Response:

{ "errorCode": "UNPROCESSABLE_ENTITY", "message": "The value passed for the 'fromEmailAddress' parameter is invalid." }

I want to send replies/comments as a specific contact in Zoho Desk, but it seems only the ticket author is allowed to comment. How can I achieve this? Is there a way to post a comment or reply as a contact associated with the ticket?

Any guidance would be appreciated.

Thanks!

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