Sendmail Sample Usage

mail.txt:

MIME-Version: 1.0 
Content-Type: text/html 
From: newsletter@shopbah.com 
Subject: TESTING 123 hehehe 

<html><head><title>TESTING ONLY BAH</title></head> 
<body> 
<strong>Content line</strong> 1 
<strong>Content line</strong> 2 
<strong>Content line</strong> 3 
</body></html>

* sendmail address@example.com < mail.txt