You don't need a heredoc when you have the text in a variable already.

use this instead 
  ->Part({
         ctype => 'text/html',
         disposition => 'NONE',
         msg => $var})

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In reply to Re^4: problem with Mail::Sender while sending email by james2vegas
in thread problem with Mail::Sender while sending email by chandanperl

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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