det kommer jo an på hvordan du generer dine emails (skriver du f.eks. bare til et "mail pickup directory")
RFC 2046
http://tools.ietf.org/html/rfc2046#section-5.1.4(det er IKKE alle mail læsere der forstår det / viser det ordentligt (Content-Type: multipart/alternative))
fra siden.....
best choice is the LAST part of a type supported by the recipient
system's local environment.
"Multipart/alternative" may be used, for example, to send a message
in a fancy text format in such a way that it can easily be displayed
anywhere:
From: Nathaniel Borenstein <nsb@bellcore.com>
To: Ned Freed <ned@innosoft.com>
Date: Mon, 22 Mar 1993 09:41:09 -0800 (PST)
Subject: Formatted text mail
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary=boundary42
--boundary42
Content-Type: text/plain; charset=us-ascii
... plain text version of message goes here ...
--boundary42
Content-Type: text/enriched
... RFC 1896 text/enriched version of same message
goes here ...
--boundary42
Content-Type: application/x-whatever
... fanciest version of same message goes here ...
--boundary42--
In this example, users whose mail systems understood the
"application/x-whatever" format would see only the fancy version,
while other users would see only the enriched or plain text version,
depending on the capabilities of their system.
In general, user agents that compose "multipart/alternative" entities
must place the body parts in increasing order of preference, that is,
with the preferred format last. For fancy text, the sending user
agent should put the plainest format first and the richest format
last. Receiving user agents should pick and display the last format
they are capable of displaying. In the case where one of the
alternatives is itself of type "multipart" and contains unrecognized
sub-parts, the user agent may choose either to show that alternative,
an earlier alternative, or both.
