Posted-Date:
Date submitted sendmail
The Posted-Date:
header is used by some old Usenet news software and
some mailing-list software to indicate the date and
time that a mail message was posted (submitted for
distribution). The Date: header, on the other hand, shows
when the message was mailed. In actual practice, the
two usually show the same date and time.
When sendmail tries to determine
the originating date of a mail message, it first
looks for a Posted-Date: header. If one is found,
it uses that date. Otherwise, it uses the date from
the Date: header.
Whichever is used, the result is stored into the
$a macro ($a on page 802).
The Posted-Date:
header is not a part of the RFC2822 standard, so it
should not be declared in the
sendmail configuration
file.
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