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Chapter 20. The M (Mail Delivery Agent) Configuration Command

Other than relaying mail via SMTP or LMTP, the sendmail program does not perform the actual delivery of mail.[1] Instead, it calls other programs (called mail delivery agents) to perform that service. Because the mechanics of delivery can vary so widely from delivery agent to delivery agent, sendmail needs a great deal of information about each delivery agent. Each sendmail M configuration command defines a mail delivery agent and the information that sendmail needs.

[1] For the purpose of this discussion, we gloss over the fact that sendmail actually can deliver directly to files (Section 12.2.2).



    		Preface
    		Chapter 1. Some Basics
    		Part I: Build and Install
    		Part II: Administration
    		Part III: The Configuration File
    		Chapter 17. Configuration File Overview
    		Chapter 18. The R (Rules) Configuration Command
    		Chapter 19. The S (Rule Sets) Configuration Command
    		Chapter 20. The M (Mail Delivery Agent) Configuration Command
    		20.1 The M Configuration Command
    		20.2 The Symbolic Delivery Agent Name
    		20.3 The mc Configuration Syntax
    		20.4 Delivery Agents by Name
    		''cyrus'' '''
    		''cyrusv2'' '''
    		''discard'' '''
    		''error'' '''
    		''fax'' '''
    		''*file* and *include*'' '''
    		''local and prog'' '''
    		''mail11'' '''
    		''ph'' '''
    		''pop'' '''
    		''procmail'' '''
    		''qpage'' '''
    		''smtp, etc.'' '''
    		''usenet'' '''
    		''uucp'' '''
    		20.5 Delivery Agent Equates
    		''/=(forward slash)'' '''
    		''A='' '''
    		''C='' '''
    		''D='' '''
    		''E='' '''
    		''F='' '''
    		''L='' '''
    		''M='' '''
    		''m='' '''
    		''N='' '''
    		''P='' '''
    		''Q='' '''
    		''R='' '''
    		''r='' '''
    		''S='' '''
    		''T='' '''
    		''U='' '''
    		''W='' '''
    		20.6 How a Delivery Agent Is Executed
    		20.7 Pitfalls
    		20.8 Delivery Agent F=Flags
    		''F=%'' '''
    		''F=0 (zero)'' '''
    		''F=1 (one)'' '''
    		''F=2'' '''
    		''F=3'' '''
    		''F=5'' '''
    		''F=6'' '''
    		''F=7'' '''
    		''F=8'' '''
    		''F=9'' '''
    		''F=: (colon)'' '''
    		''F=| (vertical bar)'' '''
    		''F=/ (forward slash)'' '''
    		''F=@'' '''
    		''F=a'' '''
    		''F=A'' '''
    		''F=b'' '''
    		''F=c'' '''
    		''F=C'' '''
    		''F=d'' '''
    		''F=D'' '''
    		''F=e'' '''
    		''F=E'' '''
    		''F=f'' '''
    		''F=F'' '''
    		''F=g'' '''
    		''F=h'' '''
    		''F=i'' '''
    		''F=I (uppercase i)'' '''
    		''F=j'' '''
    		''F=k'' '''
    		''F=l (lowercase L)'' '''
    		''F=L'' '''
    		''F=m'' '''
    		''F=M'' '''
    		''F=n'' '''
    		''F=o'' '''
    		''F=p'' '''
    		''F=P'' '''
    		''F=q'' '''
    		''F=r'' '''
    		''F=R'' '''
    		''F=s'' '''
    		''F=S'' '''
    		''F=u'' '''
    		''F=U'' '''
    		''F=w'' '''
    		''F=x'' '''
    		''F=X'' '''
    		''F=z'' '''
    		''F=Z'' '''
    		Chapter 21. The D (Define a Macro) Configuration Command
    		Chapter 22. The C and F (Class Macro) Configuration Commands
    		Chapter 23. The K (Database-Map) Configuration Command
    		Chapter 24. The O (Options) Configuration Command
    		Chapter 25. The H (Headers) Configuration Command
    		Part IV: Appendixes
    		Bibliography