Describes the configuration commands generally, and the V command specifically.

Covers configuration using m4, and describes most FEATUREs.

Describes the use and syntax of rules in rule sets.

Covers rule sets generally, and many named ones specifically.

Lists and describes all delivery agents.

Shows how to define a macro, and lists them all.

Describes class macros and how to read them from files.

Describes database-maps and shows how to use them all.

All options described in gruesome detail.

Email headers and how they relate to the configuration file.

How to declare, use, and write Milters.