Reply-to not working

Replies: 0

Hi. I have a problem with with reply-to value in additional headers. The thing is, it doesn’t work – I can only send replies to my own email. Everything in my contact form is set to default. How can I fix it?

It’s not a plugin conflict nor theme conflict – I disabled everything just to confirm this. I use Contact Form 5.3.2 because 5.4 is broken (send button becomes unclickable).

Thanks,
Kacper