Forcing viewing HTML for certain senders

[Chris Down]

Is there some way to force viewing HTML for certain senders? I tend to prefer 
reading plain text over HTML (which I auto_view with w3m), but some senders 
send stupidly broken e-mails as plain text, and the only reasonable thing to do 
is view the HTML content instead.

For example, some senders use mail software that that consistently just says  
"plain text version unavailable" in the plain text version, which is frankly 
just amazing, but the HTML version they send with it looks fine in w3m, so I'd 
prefer to view that by default for them.

Thanks!