It carries plenty of meaning. Your email client is Mutt,unless you rewrote the header.
If it makes it easier, the read my question again but with /User-Agent/MyOwnMysteryHeaderThatIsRFCCompliemt/ Victor Duchovni <victor.ducho...@morganstanley.com> wrote: On Mon, Mar 07, 2011 at 08:04:54AM +1100, Brad Hards wrote: > On Mon, 7 Mar 2011 07:47:01 am Victor Duchovni wrote: > > SMTP is not HTTP. There is no "User-Agent" header in RFC 822 messages. > > I don't think its in the spec, but there is in your email: > User-Agent: Mutt/1.5.16 (2007-06-09) Regardless, this is a non-standard header element and carries no meaning. It should be neither added by the MUA, nor removed by the MTA. -- Viktor.
