I'd use ODS HTML to create the complete body of the email (including tables and free text).
Then do
data _null_;
file Mailbox;
infile "/home/sm25967/DQ_2/QVCDE_QC_Report/result.html";
input;
put _infile_;
run;
That way your whole mail body is formatted as HTML, and the mail agents will understand that because the mail body starts with a <HTML> tag.
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