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If your server does not parse html, then you need to install html2text. On Centos, this can be done using yum:
yum -y install html2text
This is useful if you have a form on your site and when someone fills it out, the html code shows up in your email, instead of having just the form text.
I very seldom contact support, but if I do, the response is always prompt and issues are always resolved.