If you have a sevenstring.org full mailbox (eg: You contributed $20 or more to the forums and have the "Media" dropdown menu) you now have a second option for reading your sevenstring.org mail. In addition to the Horde webmail page, I've added forum-integrated webmail that will save all of your settings.
Media Dropdown -> Integrated Webmail.
You'll need to click on settings and put in the mail servers (mail.sevenstring.org for both) and your login name (firstname.lastname@example.org) as well as your password. The forums will save your settings, and you can now one-click check your mail.
It's not as powerful as the "full" external webmail software, but it's handy anyhow.
Let me know if there are any bugs, if you forgot your settings, or otherwise.