REBOL [
    Title: "Email Headers"
    File:  %mailheader.r
    Date:  10-Sep-1999
    Purpose: {Send email with a custom header.}
    Category: [email net 1] 
]

header: make system/standard/email [
    To: luke@rebol.com
    From: han@rebol.com
    Reply-To: han@rebol.com
    Subject: "Testing this!"
    Organization: "REBOL Base"
    X-mailer: [REBOL] 
    MIME-Version: 1.0 
    Content-Type: "text/plain"
]

message: {
Just testing scripts again...

-han
}

send/header luke@rebol.com message header