The ClientKeyFile option is not safe. If specified from the command line, it can cause sendmail
to relinquish its special privileges.
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986 | Chapter 24: The O (Options) Configuration Command
24.9.18 ClientPortOptions
Client port option settings V8.10 and later
The sendmail program can run in two connection modes: as a daemon, accepting connections;
or as a client, making connections. Eachmode can connect to a port to do its work.
The options for the daemon port are set by the DaemonPortOptions option (?§24.9.27 on
page 993). The options for the client are set by this ClientPortOptions option.
This ClientPortOptions option sets the options for the outgoing connection. The form for
this option is as follows:
O ClientPortOptions=pair,pair,pair ?†? configuration file (V8.10 and later)
-OClientPortOptions=pair,pair,pair ?†? command line (V8.10 and later)
define(`confCLIENT_OPTIONS??,``pair,pair,pair????) ?†?mc configuration (V8.10 through V8.11)
CLIENT_OPTIONS(``pair,pair,pair????) ?†? mc configuration (V8.12 and later)
The ClientPortOptions option is followed by a comma-separated list of pairs,* in which
each pair is of the form:
key=value
The complete list of key and value pairs is can be found under the DaemonPortOptions
option (see ?§24.
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