Is there a “no-reply” email header?

Question

I often see automated emails postfixed with a message like

Amazon:

*Please note: this e-mail was sent from an address that cannot accept incoming e-

Answer 1

No, there's no no-reply header.

However, you can add an empty reply-to header:

reply-to: <>

Which is valid according to RFC 5322, Section 3.6.2. Unfortunately, the RFC never actually specifies what an empty reply-to field means. I think most email clients just ignore it.