The joy of Reply-To (was Re: Setup of DNS caching name server for home server)

[Alan Cox]

> header.  It IS the case that in the absence of a reply-to header it uses
> the from header, but where the reply-to header exists it should ONLY
> reply to the reply-to header address(es).  Do more reading about how
> e-mail works...

If you mean RFC 8.2.2 section 4.4.4 then remember

" This recommendation is intended  only  for  automated  use  of
  originator-fields  and is not intended to suggest that replies
  may not also be sent to other recipients of messages.   It  is
  up  to  the  respective  mail-handling programs to decide what
  additional facilities will be provided."


What the buttons do is entirely up to the mail client. Most sane ones map
Reply to honour the Reply-To: field and things like Reply-All to the
from/cc and to add the Reply-to: address to the cc: list


PS: if you are going to be pedantic it would have been good manners to
have changed the subject line  </troll>