I use Drupal 9 and the Rules module to send emails when an Article node is updated.
I installed the Mimemail module and set the formatter to mimemail; all the field are correctly rendered. Only {{ node.body.value }} displays the HTML markup in the mail directly.
The rule settings are the following.
Hello, {{node.field_unit}} !<br> New Message Alert!<br> <br> id:{{ node.field_id }}<br> mail:{{ node.field_mail }}<br> type:{{ node.field_type }}<br> time:{{ node.created }}<br> subject:{{ node.title }}<br> content:<br> {{ node.body.value }}<br> The received email is rendered like in this screenshot.
These are the value stored in the database.
I'm not sure how to solve this.
Could anyone help me?

