Switching between text/html email

[TimQuelch]

I often want to switch between whether I send plain text email or text+html depending on who I am sending email to. Right now I manually switch between org-msg and notmuch-message modes depending which I want to send, but this is becoming unwieldy.

I'm thinking of submitting a PR which will easily allow switching between text modes. The way I was thinking was by adding more properties which control what is sent:

:PROPERTIES:
:reply-to: nil
:attachment: nil
:html: t
:text: t
:END:

The default values when creating a new email would be determined by a customise option.

I've had a look at the existing code in org-msg-prepare-to-sendand I have a few questions:

• What is the deal with org-msg-mml-recursive-support? This evaluates to false on my computer, Which means a lot of the mime handling is done by org-msg-mml-into-multipart-related (as far as I can tell). org-msg-mml-recursive-support evaluates to true if the function mml-expand-all-html-into-multipart-related is defined. In what cases is this function defined?
• Are attachments handled any differently in plaintext mime vs html mime?
• I have already submitted a PR to allow customising the text export backend to give the user more control about how plain-text email looks

[TimQuelch]

I've opened a PR #71

As far as I could tell mml-expand-all-html-into-multipart-related is relatively new and will recursively process all text/html blocks, whereas the old behabiour would not trigger recursively. This means we are required to modify the mml structure directly after parsing.

[jeremy-compostella]

We can close this issue right ?