Hi,

Thank you for posting on Microsoft Communities.

The option is not available in Windows 10 mail app. I suggest you to give us a feedback using Windows 10 feedback app.

If you want to see the recipients, I suggest you to log into www.outlook.com  on your favorite browser and check the sent items for the recipients.

Hope this information is helpful.

Thank you.  

That answer is not helpful at all!!!  The purpose of the BCC is so the recipients do not have the email address of the other recipients, NOT so the sender can't see to whom the email was sent. 

This needs to be changed! ASAP

That's just killed Windows 10 mail app for me. 

Let me know when it become useful again.

Hi,

Thank you for posting on Microsoft Communities.

The option is not available in Windows 10 mail app. I suggest you to give us a feedback using Windows 10 feedback app.

If you want to see the recipients, I suggest you to log into www.outlook.com  on your favorite browser and check the sent items for the recipients.

Hope this information is helpful.

Thank you.  

What about if you are using Win 10 mail app as an email client for another service? Then there is no option to do the above. Seriously? This is RIDICULOUS Microsoft. I'm trying to run a small business and, of course, that involves sending group emails to lots of blind copied contacts. How the hell am I supposed to know if they received it or not?

I agree, this is a ridiculous state of affairs. The sender should have the right to see to whom they have sent the email, it is only the recipients that should not have access to all the addressees .

Sort it out Microsoft!