You can easily submit newsletter modifications through the Admin Portal by selecting your newsletter on the draft review screen and clicking Request Changes. Once you click Request Changes, enter a detailed description of the revisions you need and attach any files or images necessary. The Questline team will make the modifications and notify you when they are complete.
If you need to replace an article, click Edit Mode on your newsletter then the replace link in the upper right of the article you would like to replace. Once you choose your new article, click Insert Article.