<defaultvalue><![CDATA[<div><img src=<https://xxserver/mylogo.png> /></div>

<p />

<table width="100%">

<tr><td align="center">xxxx</td></tr>

<tr><td align="center">xxxx</td></tr>

<tr><td align="center">xxxxx</td></tr>

<tr><td align="center">xxxxx</td></tr>

</table>

<p />

<table>

<tr><td>Label #:</td><td>${record.transactionnumber}</td></tr>

<tr><td>Date:</td><td>${record.trandate}</td></tr>

<tr><td>Number #:</td><td>${record.custom_number}</td></tr>

</table>]]></defaultvalue>

It's probable you need to escape your HTML. In what context does it "get rejected"? What is the indication you get that it's rejected?