Gmail has always ignored the
Reply-To header in the e-mail generated by contact forms submitted from my web site. So when I try to reply a message like this:
From: email@example.com To: firstname.lastname@example.org Reply-To: email@example.com
... I get a compose window with
firstname.lastname@example.org as recipient. I don't normally notice the error until I get my own message back.
The funny thing is that Gmail actually implements the header but the implementation is buggy. The bug appears to be related to using your own e-mail address (i.e., you don't hit it in e-mail for third-parties).
My questions is whether someone has found an official statement about the issue or, at least, some specs about how it's implemented. The info I've gathered in Google help and forums is far for complete.