html mail to mailx from linux boxes.

mailx -s "Test HTML output in outlook / GMAIL
MIME-Version: 1.0
Content-Type: text/html" -r noreply@prologis.com zafrulla.khan@xyz.com <<-EOF
<pre>
<b>
<h1>
`cat /etc/group`
</h1>
</b>
</pre>
EOF