I haven't used a E71/S60 handset in so long...

You might inquire at a dedicated Nokia 'E' series forum for those particulars. As Bob has suggested, there very well may be an app that handles output of full HTML messages. I've heard that Profimail can send HTML email messages, but I haven't used it personally. It's quite long in the tooth now, since that phone's ancient. Before you plunk down any cash on an app, make certain you have the support you require.

As I recall, even when I was configuring my wife's old S60 powered handsets, getting the formatting just right was often voodoo at best. It sometimes depended on her exchange account settings w/ the network admin. YMMV.

Newer smartphones don't have so many issues in this regard, luckily.