H line
Header line All versions of sendmail
The lines of text that form the message header are
saved to the qf
file, one per H
line. Any header lines added by
sendmail are also saved to
H lines in the
qf file.
The form of the H
line is:
HdefinitionThe H must begin
the line, and the
definition must
immediately follow with no intervening space. The
definition is exactly
the same as, and obeys the same rules as, the
H commands in
the configuration file (Overview on page 1120). Beginning with V8.10, if the
header lacks header flags, an empty pair of ? characters are
prefixed to the definition.
When sendmail writes header lines
to the qf file,
it pre-expands sendmail macros
(replaces expressions such as $x with their values)
and preresolves conditionals ($?, $!, and $.). Beginning with
V8.10, the headers in the qf file might have been rewritten by
rule sets.
The order in which H lines appear in the qf file is exactly the
same as the order in which they appear in the
delivered message.
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