You can send E-Mail newsletters with the 'Dreamhost Announcement List' feature from your WordPress dashboard.
Step 1 - Dreamhost: Go to the Dreamhost Panel, 'Mail > Announce Lists > Add New Announcement List', setup your announcement list. Then go to the Web Panel API > check 'All announcement_list functions' and click on 'Generate a new API Key now!' at the bottom of the page. Now you get the required API Key.
Step 2 - WordPress: Upload the sxss Dreamhost Announcements plugin to your blog, activate it, go to 'Tools > sxss Dreamhost Announcements'. Enter the API Key (step 1) and save it. Now you can post announcements directly from your dashboard!
Thanks for using one of my plugins. Check out my other plugins in the WordPress repository!