A couple of weeks ago, I was thinking about how I may build an advanced search utility for my own email archive. One way to make complex queries on the archive seemed to be to put it all into a relational database. Since the Dbmail system stores email in that way, I asked to its developers and to Harald Reindl (an email administrator at The Lounge who already uses Dbmail: I found him in the PostFix Mailing list archives) if Dbmail could be used in that way. The feedback I got made me change my mind about how to rebuild my own email search system, for the reasons explained below. At the same time, how and why Harald and his company use Dbmail seemed really interesting. Here’s the full story.