sendmail, 4th Edition

${daemon_flags}

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Listening daemon's flags

V8.10 and above

The letters that form the value of the DaemonPortOptions=Modify option (See this section) are stored in the ${daemon_flags} macro when the daemon first starts up. If the Modify was not specified for that port, the value stored in ${daemon_flags} is an empty string.

When a value is stored in ${daemon_flags} , each letter in that value is separated from the others by a space, and capital letters are doubled . If that option, for example, is declared like this:

 DaemonPortOptions=Modify=bcE 

the value of the ${daemon_flags} macro will become:

 b c EE 

Capital letters are doubled so that they can be detected in rules. Recall that rules view their workspace in a case-insensitive manner (that is, e is the same as E ). Doubling allows the LHS of rules to be designed like this:

 R $* e $*   match a lowercase E  R $* ee $*   match an uppercase E  

${daemon_flags} is not used in the default configuration file, but is available for you to use in rules of your own design. Note that a $& prefix is necessary when you reference this macro in rules (that is, use $&{daemon_flags} , not ${daemon_flags} ).

${daemon_flags} is transient. If it is defined in the configuration file or in the command line, that definition can be ignored by sendmail .