${server_addr} is transient. If it is defined in the configuration file or in the command line,
that definition can be ignored by sendmail. ${server_addr} must never be set withth e
macro database map (?§23.7.12 on page 925) to a value that is empty.
21.9.90 ${server_name}
The hostname of the connected-to machine V8.11 and later
When sendmail connects to another machine to send email, it gathers two pieces of information
about that machine: its name and its IP address. If the connection is over a
network, the host name is stored in this ${server_name} macro. If the connection is local, as
withLMTP, this ${server_name} macro is given the name of the delivery agent as its value.
If neither situation is true, this ${server_name} macro is given the literal value local.
The ${server_name} macro is used primarily withth e authinfo (?§5.1.5.1 on page 195), tls_
server (?§5.3.8.2 on page 214), and try_tls (?§5.3.8.4 on page 217) rule sets.
The ${server_name} macro is available for your use in rule sets, and can be useful, for
example, in policy control. Note that a $& prefix is necessary when you reference this macro
in rules (that is, use $&{server_name}, not ${server_name}).
${server_name} is transient. If it is defined in the configuration file or in the command line,
that definition can be ignored by sendmail. ${server_name} must never be set withth e
macro database map (?§23.
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