[ht_th]

It might be interesting to include "pine" and "mutt" as well, as a baseline of mail clients that do not support HTML out of the box. (At least with mutt you can set it up to automatically render HTML emails via "w3m")

More importantly, though, I convinced all mail clients I use to just show plain text when viewing and writing my emails. Often there are HTML emails in which I do not see all the content, or content at all. For me this is nice because most HTML emails I get are spam, marketing related, or organizational nonsense.

[inops]

I use Gnus in Emacs as my email client. I've got it set up to render plain text if available, but if the mail is only HTML, it will fallback to use Emacs' shr (Simple HTML Render) library. It's basic support, but works well enough most of the time to make the mail readable. Worse comes to the worse, I just open the HTML in a web browser. If I get to that stage, it's almost always spam or something else not worth reading.

[e12e]

Doesn't (al)pine support html part out of the box (not sure, been a while since I used pine). I'd imagine support for more mime types that eg Gmail via:

http://alpine.x10host.com/alpine/alpine-info/misc/mime.html

But I might be wrong. I thought both pine and mutt would handle html through w3m or something?

[fanf2]

Pine (or rather Alpine) does have HTML support built in and enabled by default.

[rinze]

Same for me. I have a 'newsletters' folder which is the only one for which mutt will try to show me the HTML part first. Otherwise, it's plain text.