Name
${mail_host}
Synopsis
Upon
receipt of the MAIL FROM: address, a delivery agent is selected by
the RHS of a parse rule set 0 rule, which defines
a triple that contains three pieces of information for that address:
$#delivery_agent $@ host $:addressThe $@ portion of the triple contains the host to
which to connect for delivery. For example:
wash.dc.gov
Once that host is determined for the $@ part of
the triple, it is copied to this ${mail_host}
macro.
${mail_host} 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 $&{mail_host},
not ${mail_host}).
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