my own css for mu4e compose with org-msg

[quabolasse]

I confirm that...

• I searched the FAQ, issue tracker, discussions board, documentation, and wiki, and did not find an answer to my question.

• Any discussions with or conclusions derived from the use of LLMs will be omitted from my question.

What is your question?

How can I use my own CSS when composing mail with mu4e +org? I tried adding some lines from my vannilla emacs config to the end of custom.el

(after! org-msg
  (org-msg-enforce-css t)
  (org-msg-css "
body {
  font-family: Arial, Helvetica, system-ui, sans-serif;
  font-size: 12pt;
  line-height: 1.3;
  color: #000000;
}")

but I get this error:
Symbol’s function definition is void: org-msg-enforce-css

Grateful for any thoughts,
Lasse

System information

No response

[EyoelYT]

If they are variables to set, they need a setq to set the variables

(after! org-msg
  (setq org-msg-enforce-css t)
  (setq org-msg-css "
body {
  font-family: Arial, Helvetica, system-ui, sans-serif;
  font-size: 12pt;
  line-height: 1.3;
  color: #000000;
}"))

[quabolasse]

OMG, how could I miss this... Thank you