${ntries} is transient. If it is defined in the configuration file or in the command line, that
definition can be ignored by sendmail. Note that a $& prefix is necessary when you reference
this macro in rules (that is, use $&{ntries}, not ${ntries}).
21.9.76 $o
Token separation operators V8.6 and earlier
Prior to V8.7, the $o macro stored as its value a sequence of characters, any one of which
could be used to separate the components of an address into tokens. That role has been
taken over by the V8.7 and later OperatorChars option (?§24.9.83 on page 1062).
For backward compatibility, the $o macro is still honored by V8.7 sendmail in preversion 7
configuration files (?§16.5 on page 580). Otherwise, it is unused in version 7 and later
configuration files.
21.9.77 ${opMode}
The startup operating mode V8.7 and later
Beginning withV8.7, the ${opMode} holds as its value the operating mode that sendmail was
started with. The operating mode is set with the -b command-line switch(?§6.7.3 on page
233). For example, if sendmail were started as a daemon with -bd, the value in ${opMode}
would become d.*
Once set, ${opMode} retains its initial value as long as sendmail runs. It can be changed only
by defining it in the configuration file (not recommended). Currently, ${opMode} is used
* Because the LHS of rules are case-insensitive, you cannot use just this macro to detect the difference between
-bd and -bD.
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