From: jdoe@machine.example
To: mary@example.net
Subject: Jeff's e-mail?
Date: Fri, 21 Nov 1997 09:55:06 -0600
Message-ID: <1234@local.machine.example>

What is Jeff's e-mail?


From: mary@example.net
To: jdoe@machine.example
Reply-To: smith@home.example
Subject: Re: Jeff's e-mail?
Date: Fri, 21 Nov 1997 10:01:10 -0600
Message-ID: <3456@example.net>
In-Reply-To: <1234@local.machine.example>
References: <1234@local.machine.example>

Jeff's e-mail is jeff@example.net, but
you may want to e-mail his assistant
rob@example.net


To: smith@home.example
From: jdoe@machine.example
Subject: Re: Jeff's e-mail?
Date: Fri, 21 Nov 1997 11:00:00 -0600
Message-ID: <abcd.1234@local.machine.test>
In-Reply-To: <3456@example.net>
References: <1234@local.machine.example> <3456@example.net>

Thanks!