sendmail, 4th Edition

DaemonPortOptions

Options for the daemon V8.1 and later

The sendmail program can run in two connection modes: as a daemon, accepting connections; or as a client, making connections. Each mode can connect to a port to do its work. The options for the client port are set by the ClientPortOptions option (ClientPortOptions on page 986). The options for the daemon are set by this DaemonPortOptions option.

This DaemonPortOptions option is used to customize the daemon’s SMTP service. The form for this option is as follows:

O DaemonPortOptions=pair,pair,pair                  ← configuration file (V8.7 and
later)
-ODaemonPortOptions=pair,pair,pair                  ← command line (V8.7 and
later)
define(`confDAEMON_OPTIONS',``pair,pair,pair'')     ← mc configuration (V8.7 and
later)
DAEMON_OPTIONS(``pair,pair,pair'')                  ← mc configuration (V8.11 and
later)
OOpair,pair,pair                                    ← configuration file
(deprecated)
-oOpair,pair,pair                                   ← command line (deprecated)

The DaemonPortOptions option is set to a comma-separated list of pairs,^[370] where each pair is of the form:

key=value

As of V8.14.1, all keys are case-sensitive.^[371] That is, Children differs from children. Prior to V8.7, an unknown key was silently ignored. With V8.8 and later, an unknown key is still ignored but now causes the following error to be printed:

DaemonPortOptions unknown parameter "key"

Beginning with V8.10, you can declare multiple DaemonPortOptions options, where each causes the single listening daemon to accept connections over multiple sockets.

The list of all currently ...