That is the way this works in Discourse; you forwarded it, you were the person who sent that email. You’d need to get the person who originally sent the mail to send it to the correct email address.
aha, I got the logic. but it’s a little weirdo in some use-cases:
people like to talk to people not to a robot-like email address. and those who communicate via email, are those who are still afraid to be in a community! in these cases, engaging them via email and communication with one person is much easier.
and then asking them if “it’s ok for them to forward their emails to the forum so that others can also contribute”.
they are usually ok with this, especially knowing that they don’t need to do anything else!
this way, one need to ask them to re-send their emails to another email as well!