I have to make something like a contact form to send email from a website. In the form fields there are the sender mail address and is where the receiver reply to.
How should I set mail headers to be compliant to most antispan and to let the received use the reply button of his mail client?
I read this post What's the difference between Sender, From and Return-Path? But I did not understand what is the right setting for this case.
Usually I used the From: field but this resulted a spoofed mail and many antispam delete them (obiousbly my site MTA is not on contacts SPF).
