Radiant Database Mailer Extension is used to add database persistency to emailed forms, and it just got fresh features.
Besides the possibility to save posted form fields and entire email messages to the database and export data to CSV and XLS, now it saves e-mail attachments using paperclip. Any attachments that the email might have will be saved on the file system. They can be downloaded from the details page of every record.
Also, the extension got thoroughly tested using Cucumber and webrat/email_spec.
Check out the source code on github.
For installation and configuration details visit the Radiant Database Mailer Extension documentation page.