k9mail/k-9 — pull request #100 by ashleywillis (2011-11-15 04:17:36+00:00)
Title: Message Format: Automatic (plain text unless replying to an HTML message)

Setting Message Format to Automatic sets K-9 to compose only plain text messages (really, it should do that no matter what the setting since K-9 can't actually compose an HTML message), and on replies or forwards use HTML if the original message has an HTML body, otherwise use only plain text.

Settings default to Plain Text if a user downgrades K-9.

Mostly resolves Issue 2900: Inline encryption should use plain-text and not HTML, the exception being replying to or forwarding an html message (but the user can click to edit the quote, which will then set the message to text/plain).