[Q] How to turn off return (read) receipt in Gmail mobile?

Hello everyone,

Is it possible to disable or turn off return receipts in Gmail?

Today I got an email that had a read receipt. I thought Gmail does not support read receipts or return receipts or it would ask me if I wanted to send one. But apparently it doesn't work like that and the sender of the email told me that he got a read receipt delivered from my gmail when I opened the mail.

I would like to turn off or disable this feature. Can someone please let me know if its possible and how to do it?

Thanks in advance. Cheers.