Note: If you wish to do this, please make sure we have set it up for you ahead of time.
When logged into the site, go to ADD > NEWSLETTER / BULLETIN.
Give it a title, like Newsletter – October 10th, 2020 (we recommend you add the date of the newsletter in there).
Paste the url of your html newsletter that your newsletter provider gives you into the NEWSLETTER URL field.
Save at the top right of the panel.