I'm asking because their extensive FAQ section does not answer this question. Also, I have tried to set up an experimental list - see [groups.yahoo.com...] - and send out a HTML message, but it just displays the source code.
All of us at our offices have HTML truned off on email programs because it slows downloading so much, increases security risks, and most HTML emails are advertising and spam (I know yours isn't litmania). I know many others do the same.
However I would question whether using HTML email rather than plain text is a sign of living in the present! Or is it just using technology because it is there, or attempting to get noticed by lots of fancy packaging?
HTML email that insists on being the only option for us come in "view source" type format and just gets deleted, and the whole subscription quickly afterwards. I question the value of using HTML email over text email when it is just not received or annoys a substantial proportion of the audience. Then again if you have a highly targeted list where HTML actually offers substance rather than just looking pretty, and people are happy with the higher loading times and security risks it might be worth it. But in general - I see far more downsides than upsides.
If there is no "keep email text based" pressure group, I II'd start it!