${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 with LMTP, 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 with the authinfo (Authinfo and the access database (V8.12 and
later) on page 195), tls_server (The access database with tls_server and
tls_client
on page 214), and try_tls (Disable STARTTLS with the try_tls rule
set
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 with the macro
database map (macro on page 925)
to a value that is empty.
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