Here is the message I'm sending that doesn't work:

HTMLheadmeta content="TX_HTML32 12.0.230.500"
name="GENERATOR"title/titlestyle type="text/css"BODY
{font-family:
'Arial';font-size: 12pt;font-weight: normal;font-style: normal;}
P.NORMAL {margin-top: 5pt;margin-bottom: 5pt;font-family: 'Times New
Roman';font-size: 12pt;font-weight: normal;font-style: normal;}
P {margin-top: 0.05pt;margin-bottom: 0.05pt;font-family:
'Arial';font-size:
12pt;font-style: normal;}
/style/headbody bgcolor="#FFFFFF" text="#000000"pspan
style="font-size:10pt;"Highimg border="0" src="cid:Image1"
width="307" height="230"
alt="[image]"/spanspan style="font-size:10pt;"Joe/spanspan
style="font-size:10pt;",/span/ppspan
style="font-size:10pt;"/span/ppspan
style="font-size:10pt;" /span/ppspan
style="font-size:10pt;"/span/ppspan
style="font-size:10pt;" /span/ppspan
style="font-family:'Microsoft Sans
Serif';font-size:8.2pt;" /span/ppspan
style="font-size:10pt;" /span/ppspan
style="font-size:10pt;"/span/ppspan
style="font-size:10pt;" /span/p/body/HTML

Here is the equivalent message generated by a different source that
does work:

HTMLHEADTITLE/TITLE
META http-equiv=Content-Type content="text/html; charset=unicode"
META content="MSHTML 6.00.2900.2180" name=GENERATOR
STYLE type=text/css BODY {font-family: 'Arial';font-size:
12pt;font-weight:
normal;font-style: normal;}
P.NORMAL {margin-top: 5pt;margin-bottom: 5pt;font-family: 'Times New
Roman';font-size: 12pt;font-weight: normal;font-style: normal;}
P {margin-top: 0.05pt;margin-bottom: 0.05pt;font-family:
'Arial';font-size:
12pt;font-style: normal;}
/STYLE
/HEAD
BODY text=#000000 bgColor=#ffffff
PSPAN style="FONT-SIZE: 10pt"High IMG height=230 alt=[image]
src="cid:f457094b-602d-42b8-917e-3ee75bff0dd1" width=307
border=0/SPANSPAN
style="FONT-SIZE: 10pt"Joe/SPANSPAN style="FONT-SIZE:
10pt",/SPAN/P
PSPAN style="FONT-SIZE: 10pt"/SPAN/P
PSPAN style="FONT-SIZE: 10pt"/SPAN /P
PSPAN style="FONT-SIZE: 10pt"/SPAN/P
PSPAN style="FONT-SIZE: 10pt"/SPAN /P
PSPAN style="FONT-SIZE: 8.2pt; FONT-FAMILY: 'Microsoft Sans
Serif'"/SPAN /P
PSPAN style="FONT-SIZE: 10pt"/SPAN /P
PSPAN style="FONT-SIZE: 10pt"/SPAN/P
PSPAN style="FONT-SIZE: 10pt"/SPAN /P/BODY/HTML

There are differences, but none that I can see that would cause the
problem.