Problem Reading Base64 Mail

Hi all,

I receive certain e-mails that come encoded in base64 (from a self-checkout 
kiosk) and typically just get one of the following two views when I open the 
e-mail in Kmail:
(1) Part of the encoding to give an idea:
Content-Type: text/html;
Content-Transfer-Encoding: base64
Content-ID: "<3ce06042bcaceba102623cc4d670fb8f>"

PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMDEgVHJhbnNpdGlv
bmFsLy9FTiIgImh0dHA6Ly93d3cudzMub3JnL1RSL2h0bWw0L2xvb3NlLmR0ZCI+PHRhYmxl
IGlkPSJyb290IiBzdHlsZT0iYm9yZGVyLWNvbG9yOiBibGFjazsgZm9udC1mYW1pbHk6Q291
cmllciBOZXcsIENvdXJpZXIsIG1vbm9zcGFjZTsgYm9yZGVyLXN0eWxlOiBzb2xpZDsgYm9y
ZGVyLXdpZHRoOiAxcHg7IHBhZGRpbmc6IDAuNWVtOyBtYXJnaW46IDAuNWVtOyI+PHRyIHN0
....

(2) Alternatively, I see SpamAssassin's intercepted view of it:
Content Preview: "text of e-mail"

 pts rule name              description
---- ---------------------- --------------------------------------------------
 1.0 EXTRA_MPART_TYPE       Header has extraneous Content-type:...type= entry
 0.0 HTML_MESSAGE           BODY: HTML included in message
 2.2 MIME_HTML_ONLY         BODY: Message only has text/html MIME parts
 0.0 MIME_BASE64_TEXT       RAW: Message text disguised using base64 encoding
 0.0 HTML_MIME_NO_HTML_TAG  HTML-only message, but there is no HTML tag
 2.4 RDNS_NONE              Delivered to internal network by a host with no 
rDNS

I can read them just fine in K-9 Mail on my Android phone and Thunderbird 
shows most of these either as they look in K-9, or I also get the same view as 
#2 above.

I thought I saw references to this problem involving SpamAssassin, but I had 
this problem even before I installed SpamAssassin.  Can anyone help or point 
me in the right direction?

Thanks!
Don
-- 
D.C. Parris
http://dcparris.net/
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