[dunham]

For testing/dev at work, I wrote a little go app that listens to SMTP on port 2525, collects mail into a boltdb, and presents it in a very simple web UI (port 7070) that lets you browse users and their mail. (A simple drill-down of list of users / emails for user / message details, including all mime parts and download links for attachments. The top page has a "clear" button.)

It was an evening's work, so it's very simple, but it works and we've found it very useful. (The original idea was to very simply expose the application flows involving mail to selenium, but I've found it very useful for dev, too.)