This chapter has discussed two primary topics: monitoring qmail, primarily via its logs, and improving qmail's mail-handling speed. Unlike previous chapters, this chapter dealt more with maintaining the qmail architecture than extending it. This brings the narrative full-circle. As emphasized throughout this book, qmail is primarily an architecture for delivering mail. This book examined the qmail architecture from many angles, explaining its components, how to expand it, and finally how to maintain it. With this base of knowledge and approach to qmail, you are well on your way to being a highly effective administrator of a powerful mail transfer agent.
Good luck!