Sender "real" email address

[someone]

I know this has been asked before but I searched and could not find it.

Where is the setting so that the real sender's email address appears in the from box instead of the name?

[someone]

Thank you for replying. I've always had that setting (see image).

I'm trying to block some spammers using a filter at my isp. So I need their real domain address, not what appears now.

For example I get spam from "Dr.Oz....." but that is not the real address it is coming from. And the 'reply to' is to a name@domainname.link (not sure if this is a real email or just a link to elsewhere).

Is there an option to show the real address it is coming from to use in a blacklist filter?

[someone]

Thank you.