Emails from Zoho Arrive as "Read" in Other Mailboxes

Emails from Zoho Arrive as "Read" in Other Mailboxes

Hi

I have found that if I email from Zoho out to various email addresses, the email arrives marked as "read" already. I have tested this with university email systems (from 3 different universities) and it's like that with all of them. Emailing Gmail or yahoo doesn't present any problems.

What is going on and how can I fix it?

Thanks