We have HTML templates for sending transactional email in our SaaS applications. The templates are very basic, eg. <p> <b> <a>, etc. Users can also customise t

We have HTML templates for sending transactional email in our SaaS applications. The templates are very basic, eg. <p> <b> <a>, etc. Users can also customise these via a WYSIWYG editor. We then use turndown.js to convert the rendered HTML email to markdown which we then use for the text version of the email.