I have a PHPMailer script that sends an HTML Email (via the code to embed a HTML file). The HTML file is a Bootstrap 3 page that references external CSS files for the bootstrap styling.
The Email works, and is received with images etc., but without any of the CSS. Is there anything special I need to do, or is it not recommended?
There is a similar question here: How can I send HTML mails with included CSS with PHPMailer? but as it's 4 years old, I thought perhaps things may have changed..?!
If not then I guess I'll have to reformat the Email to be HTML only without CSS.