Weird question

No I havent been hacked, but yes this is a technical question that's not about the forum.

Using the Microsoft Outlook app (not desktop). Is there a way I can open the emails in my inbox without the sender knowing?

I did Google but couldn't see an answer specific to the app. Any help greatly appreciated.

Does Outlook send a response to the sender after openening an email? I knew that ages ago it was a thing to send mails and ask for an electronic return receipt. But never saw anything like that in years, mostly because no one clicked on "yes". I'm using Outlook on my Pixel and before on my Lumias and never heard about it sending a return receipt automatically

I'm using Outlook on my Pixel and before on my Lumias and never heard about it sending a return receipt automatically

You may well be right. I hope so!

EDIT actually it seems that it does but you have to login on a desktop to change the settings (if I understand correctly).

but it seems this only happens with business accounts