Sending Email as HTML fails

[eluser]skunkbad[/eluser]
[quote author="jeremygimbel" date="1259649585"]It really depends on your server configuration. Depending how PHP is setup to handle mail and what mail server software is installed, this setting is determined.

jeremy[/quote]

At least for me, I tend to be working with clients who have shared hosting, so I was hoping for a simple way to just look and see what protocol to use, but it sounds like it may be complicated.