My Question is: What line of code and where do I need to add it in order to send out an attached file, (Email_Template.html), replacing the texted $Email_Body.
Don't! You really don't want to learn MIME or SMTP.
Switch to Email::Simple (part of Perl Email Project)

In reply to Re: Email a File from Code by Anonymous Monk
in thread Email a File from Code by Anonymous Monk

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