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Qmail Quickstarter by Kyle Wheeler

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Chapter 3. Getting Email Out of the Queue

This chapter covers the output end of the qmail mail system, or how email is delivered by qmail and how it leaves the message queue. The following figure describes this part of the overall structure of qmail described in Chapter 1.

Getting Email Out of the Queue

qmail-send and the Qmail Queue

The primary function of the on-disk queue is to serve as a reliable storage and signaling mechanism for the qmail-send program, which is the heart of the qmail queuing system. The qmail-send program's most fundamental task is to make the primary routing decision: whether a given email should be delivered locally or remotely. This decision is made exactly ...

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