I am running KDE 4.14.1 In my security settings, "Prefer HTML to plain text" is checked. However, whenever I get an HTML e-mail, and open it, I see the HTML, and get a message that says: Note: This is an HTML message. For security reasons, only the raw HTML code is shown. If you trust the sender of this message then you can activate formatted HTML display for this message by clicking here. I should not have to click that every time, given my configuration.
Still present in 4.14.2.
Please close this bug as not a bug. Somehow, one folder got it's default view set to "plain text." Not sure how that happened.
Is not a bug. :)