Using gmail-message-mode for multipart mails?

[roxlu]

After spending way too much time trying to make plain/text mails display correctly in Outlook for iOS (and default iOS mail client) I learned that it's simply not possible: plain text mails that look good in mutt will always show up as if newlines are doubled in mail clients like Outlook.

Therefore I'm looking into another approach where I sent a multipart mail that uses gmail-message-mode. I'm curious if you have thought about this and maybe know a solution? I was thinking to somehow strip out the markdown syntax and use this as plain-text but also use the converted html as a html mail.

[Malabarba]

Stripping the markdown might take a bit of work, and I'm not aware of any way to do it.
One alternative is to send the raw markdown itself as the plain text version, without stripping or converting anything. Markdown makes for a pretty readable plain text afterall.